Can I get married?

I've been dating this guy for almost 2 years, he asked me to marry him and I don't know what to do cuz I still feel like it's too early, I didn't think it was that serious yet. I'm turning 19 in a few months and I don't think my mom would just agree. I really want to be with him but am not sure if I want to marry him. I'm scared that if I say no he'll leave or feel really hurt or something.
Can I get married?
Post Opinion