What do I want?!

I've been with my boyfriend for 2 years. Obviously in love. He's all for marriage (within a year or more) and im not. 95% of the time im against marrying him. I don't want it and I don't want kids. Yet from time to time, I feel I want to get married and have a family one day. But I'm very bitter to him about this and other things in general. It feels like I'm pushing him away. Sometimes I could care less and others I think I'm stupid and would be crushed if we broke up. Hence, what do I want?! Has anyone else had extremely mixed emotions about their partner and a future? If so, how do I stop this roller coaster of emotions?