I agree with Janet, only you can decide what is best for you.
Everyone I know has had difficulties in their relationships, and at one point or another seem to contemplate separation or divorce, but they didn't all go through with it.
I've been divorced for nearly 5 years. It's funny, dex started sleeping apart from me "because he fell asleep watching tv". Well, that lasted 10 years. I didn't really mind because he snored too.
Divorce was the right choice for me but I am not an advocate for divorce. I think that if you still love eachother and you've got something to work with than it's worth the effort to stay married. You'll always have ups and downs, whether you are married or single.
My two best friends seriously contemplated divorcing their husbands. My advice to them was-think back to why you fell in love with him in the first place, think about the good things. I also encouraged them to try to spend quality time with their partners. One of my friends is super stressed (and she doesn't even have a difficult child)and depressed right now. She is getting professional help. I told her that once her emmotions are under control that married life may not seem so unbearable.
I must sound like a hypocrit, after all, I am divorced. I did try to take all of my own advice but it didn't work for me. I am happily (most of the time)divorced. I miss not having a partner sometimes but I do not miss having dex as a partner.
DEX and I have actually become good friends in the past year, but it was hell getting to this point.
Does your husband know you've been thinking about divorce?
Divorcing your partner is a huge decision that only you can make.
Good luck.