Is there something wrong with me?

I honestly feel like there is something the matter with me, I am 21 I have never had a real boyfriend. Don't get me wrong I have had my heart broken, several times but through all the giddy emotions and nervous meetings and fun dates a boyfriend never stood around. Although the few recent men that broke my heart was in fact their fault, I have to admit I think a lot of it is me. I tend to go after guys that are ambitious and not looking for girlfriends or men right out of relationships and I do it so there's no future and I don't know what I am scared of. I want to eventually marry and have children but the thought of doing it now scares the **** out of me and I'm afraid every date will lead to a relationship then to marriage, but I can't see myself even in that position of comfort ability. I watch these movies and see these couples sooo in love but I am afraid I will never be that comfortable with a guy. My dream would be to date a celebrity become a famous actor or athletes wife and maybe that dream is sabotaging reality. I don't want slum or trash but I don't know what I want. I want to be happy, I want to find love the kind of love I read about in books, but maybe I am not cut out for love, maybe I'm destined to be alone. Advice please?