trapped

I've been with my boyfriend for the last 4 and a half years. We've lived together for the last two. Every time I bring up marriage he gets frustrated, like I'm being a burden. I've he doesn't want to marry me, then why doesn't he just say so. I feel like he always has to have his way. If I don't go along with it and have a happy face he gets mad. I'm almost 30. I want to get married and have a family some day. I feel like I'm wasting my time. I feel like we love each other, and I'd hate to have to find someone new after being with this same person, but let's be logical here. I could be waiting forever. I feel like he expects me to be perfect, but that ain't ever going to happen. Anyone else in this kind of situation or have been?