Considering seperation?

Now, let me start off by saying that I didn't get married to get divorced and don't really feel that it is an answer to marriage problems. However, my marriage and my feelings toward my husband has reached a point to where it's probably unfixable. I have tried to talk to him, and talk to him, and come up with solutions. I've tried to change myself and the way I approach him. I'm exhausted. He won't participate in our marriage or our life. I am at the point where it's either "stay with him for the sake of our child and be miserable. I'm a mom, I'm supposd to suffer for me child" OR seperate and leave him to be miserable and angry alone. The only thing stopping me, like I said, is our 16 month old daughter. She does adore him and I want her to be able to have both her parents at the same time..to have the "normal upbringing." But then again, my husband and I bicker constantly so that can't be any better. Please help