Dear S., I have been married for almost 19 years. There have been a few times over the years that I seriously considered divorcing my husband and walking away with my girls. I can't tell you how glad (today) that I didn't do that. Every marriage goes through hard times...fighting over stupid things like socks on the living room floor or big things like bankruptsy. Death, taxes, kids, parents, life...it just all gets in the way sometimes. For some people counseling just isn't the answer and forcing someone to partisapate doesn't work.
You can go to counseling on your own...there is no rule that both of you have to go. Sometimes taking the time to vent to a "disintrested" third party really helps you regain your perspective and gives you the breathing space you need to work on things with your partner. This has worked for me a number of times with different family relationships.
If you need to take a break and go for an extended vacation to your parents home, by all means go. But don't be too quick to throw away your marriage, or your love of your husband. Take some time to think about the reasons why you married him, and had children with him. He has to have something special in him, or you wouldn't had done either thing!
You also need to really consider your daughters. Staying married because of the kids is wrong, but not considering them and not working on your marriage for them is also wrong. Many studies have shown that the repercussions of divorce on children is far-reaching and permant. If you do divorce you will still have to have a working relationship with your husband forever, because you do share children and they deserve to have both their parents in their lives no matter what!
Take things one day at a time, one issue at a time! Don't buy into "what if". You can't control the future and you can't forsee it either. All you have is today so make the most of it!! My last shread of advice....never make a decision like divorce when you are emotional! Emotional spur of the moment decisions are the ones we tend to regret in the long run. I hope you find the peace and happiness you are seeking! Best wishes.