S.F.
I think that marriage is hard. I will be married for 20 years this summer and it is worth it but not easy. I have to stop focusing on what he is or isn't doing and focus on my own attitudes and choices. I think that if you talk to most people who are divorced they would say they wish they had worked it out. Maybe that seems like a crazy statement but from all the marriage/counseling books i have read that is the census. Do you have children? If you do you will never be rid of him.. he will always be in your life. Separation usually ends in divorce in my opinion. It is a easy way to do what you want and alot of times the temptation is too great to not withstand the pressures of other peoples attention. It is easy to get diverted from what you intended in the first place.
My heart says to you do not separate. Do not divorce. I don't know your situation though. I don't know if he is abusive or not, but i do know that you have to start being the kind of person you want him to be. Show him affection, show him kindness, show him tenderness, overlook the offenses and respond with love. When we change that always brings about change in another. It may take a while and i am not saying do not take care of yourself in the process. Just don't walk into conflict, put your feelings aside and seek to understand before being understood. That is a very hard thing to do. I think that if you watch your attidude and listen you will reap the rewards. Fireproof (the movie) and Love Dare are great resources. Please don't think that i don't know what kind of pain and overwhelming feelings you have... I probably do. I have gone through a very painful issue with my husband but as i responded with my own selfishness and loved him in the process of his selfishness i am reaping the rewards of a man who wants to change and regrets the way he has hurt me. I know that not all men will do that but if you think that your husband is that kind of man and going to counseling for over a year does show committment on his part than you need to fight for it. A great book that i think all non married people should read is: Sacred Marriage by Gary Thomas. It really does explain why marriage is hard and how much work it takes. It shows the bigger purpose of it.
My husband and i spent to much time waiting for the other one to change and we wasted alot of good years together. We are now enjoying the richness of each other after i decided to lay down my pride and be what he needed me to be. I am now getting what i have always wanted him to be as well.
I hope this helps. I know it is hard and it is good to remember that there are seasons we go through where life is hard. If we can push through it we come out stronger on the other side. If we leave and find someone else... we still have to deal with ourselves and then you get a whole new set of issues with someone else and it starts all over again. Work on you and go to counseling by yourself as well as with your husband. Make time to walk, or garden or what ever feeds your soul and chose to hang in there. I think it time it will be worth it.