I'm that close

Don't know what my son is 17 weeks old I love all 4 of my kids and my husband, but lately I just feel like everything is done is wrong. It started in February my oldest is not my husband like child well they use to get along since he was 14 months old and when he turned 12 he became abusive towards my husband and I. Punching yelling at us and being flat out disrespectful. I finally got over it after he ran away. So he moved in with my parents. I now have so much regret and I feel my marriage is falling apart I rather divorce my husband to have my son back. I'm severely depressed and I have battled depression since I was 16. I feel like a failure I'm fat can't lose weight I miss my son like crazy and then my 2 girls are my husbands pride and joy and I'm ok with that. He doesn't work he doesn't do much but expects me to clean the inside of the house and do laundry fold put away everyday and take care of the 3 kids that are home and he does nothing. I'm not sure what to do anymore please I need help I'm a stay at home mom and don't know what more I can take of this. I love all my kids. But im Not sure if I can do it much longer! Please help me