Who should I be with?

I like two guys and I have no Idea who I should be with.The first guy, Cristian, he says he loves me but, I don't believe him and he makes me feel ugly and unwanted.He also makes me happy I'm just afraid that we won't make it.....We've broken up before. The second guy, Ryan, He always makes feel me happy, Beautiful, and loved but, I won't be able to see him for a while because he's going to collage. He's asked me to marry him but, I love them both.Please help?