"How do I approch him with my distrust?"
Awe, Sug', are you being kind of hard on yourself? I mean, haven't you approached him already...more than once and in more than one way?
Look, I'm sure you're not perfect (none of us are!) and I'm sure there is work you can do to improve your end of communication/boundary setting (all of us have work to do!). But, and this is a BIG but, there isn't anything you can (or can not) do to convince your husband of the reality or rationality of your feelings. If he refuses to hear you, that's because he's making a choice. Unfortunately (fortunately?) That's Not On You sister.
His whole 'you haven't been supportive of me' thang? It's a crock of sh*t. No matter how supportive, unsupportive, enabling, not enabling you've been, if he's continuing active addiction, that's his deal, not yours. There is literally nothing you could do to make him or stop him from 'getting clean'. Nothing.
Now, of COURSE there are ways that we can support someone's recovery OR someone's addiction. And that's one way we can practice or lack integrity. But that has very, very, very little to do with his choices. You can hand a person (addicted, abusive, abused, codependent, or otherwise) recovery on a silver platter and in the end, it's up to them if they want to take it or not.
Repeat after me. I am responsible for myself and my child. I cannot change my husband. Not no how, not no way.
Breathe it in sister, 'cause putting your husband's recovery on your shoulders...okay...let me rephrase this...When *I've* put the responsibility of other adults on my shoulders, it's been a heavy burden. Like, heavy to the point of back breaking.
"How do I leave a man I feel can make my life a living hell if I take our son away?"
*Sigh*. I despise (triple despise) when people undermine the validity of this question. Having spent the past year working with domestic violence survivors (whose abusers are OFTEN addicted), I know that this is very, very, very real. Heck, we have several women on this board who are going through this ugly process right now, and it's no scoffing matter.
But there are ways that you can support yourself (and your son) through this process.
Inventory your current support network. What kind of physical, emotional, financial, child oriented, spiritual assets do you have? What kind of services can you offer (trades during transitions are invaluable. For example: I'll teach you Spanish 2hrs every week for childcare 2hrs a week. Or, I'll clean your house for 15 dollars an hour. Or, I already I have a car, house, and job. Or, feel totally alone and I don't know where to start. What ARE my skills?)
Next/at the same time, pursue legal council. You probably don't want to enter into any sort of court procedure (i.e. the labyrinth) without a good lawyer by your side. Many reputable lawyers are willing to work pro bono, or give free consultation, or will work out payment plans (this is true in my area, but might not be true in other places).
Check out your local domestic violence advocacy center. A lawyers services are invaluable, friends and family can be great, but if you find a (skilled) advocate, you will not be sorry. Advocates are there for YOU. They can help provide an emotional support and road map. Now, this is usually volunteer run and there are some DUDS out there. If you don't get the help you need, don't stop trying. You will meet a LOT of barriers, and it takes great perseverance (be easy on yourself, the barriers are societal and are not because you deserve them) to work around.
In the meantime, and this should be easier because husband is checked out and out of the house, begin gathering resources. You'll want copies of IDs, medical records, financial records, bank and credit card records, keys, car registration and titles, and Rx medications you and your son need, a change of clothes, cash, any valuables you can't part with, expensive jewelry, prepaid cellphone, etc. If you have someone you TRUST, stash this bag full of documents/valuables at a friends house. Otherwise find a bus depot locker, an advocacy center, or another safe place and keep this so that you can access it in a jam. Don't feel guilty about being a sneak. This is about survival. You need to keep yourself and your son safe. That is the number one priority and you're (probably) going to want to be non transparent about this.
This is not a normal/safe situation and thus it doesn't require normal methods of communication and transparency.
A lot of friends and family members may bow out conveniently. DV and addiction tend to make people totally overbearing (you should JUST...If *I* were you...etc.) or totally absent (well, I don't want to take sides / you're being insensitive to HIS needs, etc.)
"I do not think I can ever trust him again, considering he lied for our entire relationship. Am I in the wrong for the way I feel?"
You are never wrong for the way you feel. Feelings are just that. Most often, they aren't in our control.
Besides that, you would be insane if you trusted your husband. He has done nothing but show you he is not trustworthy. It would be like adopting a shark and treating it like it's a pet dog. Not rational.
However. You are in control of your actions and reactions. Feelings can inform our perception but it's our responsibility to make choices that are not justified by our feelings. For example, I wouldn't have hit the wall if I didn't feel so angry / you MAKE me feel this way (huh? Nope. We all make our very own feelings in our very own bodies. Things can help us to feel something, but we're still responsible for what's going on with us.) / I wouldn't be doing this if YOU were nicer/calmer/more supportive.
I want to clarify that my suggestions are only that, suggestions. I have my own experience and my opinions, feelings, ideas come from my experience, so I'm biased and what I have to offer is certainly NOT the right path for everyone or for all situations.
Bottom line is, you'll have to come to your own conclusions and choices and no matter what you decide, I think you are a rock star, totally strong and amazing. You do not deserve this dysfunction, and I'm sorry you face it. Try to believe in yourself sister. Try to treat yourself with love and self care. If mama's not taking care of mama, mama can't take care of anyone else, you know? Try to be gentle with yourself, 'cause this stuff is tough and it really IS that hard. Try to talk to yourself with the same compassion as you would a friend who was in the same situation. Most of all, know that you are not alone. You really are't.
You're going to get through this S. and I wish you serenity, courage, and wisdom. Hugs.
Ephie - Daughter of a drunk, Sister of an addict, wife of an addict in recovery, kinship care provider to a little one who experienced prenatal drug exposure and trauma, and lady with her own (LONG) laundry list of dysfunctions.