How do I save my marriage?

I just don't know what to do anymore. Last year I took the kids and moved in with my parents for a week or so to let my husband finish some work on our house that we were planning to sell. This week turned into a month, six months, over a year...He could have finished this job in a couple of weeks, but just wouldn't do it. I finally told him that we were coming home before school started-ready or not. He still did nothing and we only got the house liveable because I and my parents did all the work. It is not "done" to this day or ready to sell. Since coming home, my husband has gotten extremely clingy and hangs on me constantly and is always jealous of the attention I give the kids or the kids give me. He seems to feel guilty for being non-exsistant for a year, but not guilty enough to really do anything about it. I know that I harbor some resentment as well. I get so upset with him because he seems to think that it is all about him...what HE feels, what HE has or doesn't have, what HE wants. Nothing feels natural anymore. I try to let him have his time snuggling on the couch with me, but all the while I am just wishing he would move over and give me space. When I don't want to jump into bed with him every time he groaps my or grabs my a$$, he gets all sad and gets his little feelings hurt. When the kids would rather spend time with me than with him...he gets his little feelings hurt. He wants to be all affectionate and cuddle and spoon constantly (something that was NEVER me anyway) and I just feel smothered. He is a firefighter and works a shift of 24 on and 48 off...I look forward to the days he is on shift and am just so much more relaxed when he is gone. We have talked about all of our problems over and over again, but nothing ever comes out of it and I really think he just looks at it as an opportunity for make-up ...I just don't know where to go anymore. I don't know if I can be with him, but I don't know how I can leave him-I wouldn't even know where to start. I'm just upset and scared and confused. What do I do?