K.P.
Take a deep breath and pick ONE thing that you would like to try and do differently. When you start listing out all of the things you want to change it can seem like too much to tackle at once.
I do not suffer from depression, but I remember having a conversation with my husband about 3 years ago along the lines you are describing. I felt like we never went out with friends, I wasn't finding time to exercise, I wasn't finding time to read anymore or do the things I enjoyed before having a family. I spent all of my time working or being a "wife and mother"- somewhere "I" got lost.
His response was pretty simple... what's stopping you? I just assumed that he wanted certain things or had certain expectations of me, but I was wrong. I wanted 30 minutes a day to exercise. Great! He played with our son each night after dinner so I could get on the treadmill or go for a walk. I wanted to spend more time with grown-ups, so he stopped rolling his eyes when people invited us to go somewhere and went along. I wanted to get back to church consistently, so he started getting things done on Saturday so we could.
This didn't all happen at once, but after I started reclaiming some time to myself, I felt better and moved on to another thing. The funny thing is that I used to get frustrated with my husband for taking 30-45 minutes each night to do something quiet and now I realize that was is a genius! He knew what he needed to "reset" and made sure that he found time to do so.
Talk with your husband and see what you can do. Taking a 30 minute walk at night doesn't cost a dime. Bring your cross stitch with you so you have something to do while your son is in therapy. If the time comes that you can free up some cash, take a course at a community college or enroll in a free class at your local library.
It takes planning and communication with your spouse, but you need to MAKE time during the day for yourself!