Am I capable of loving someone? Advice?

I have friends that I love to death and would do absolutely anything for in that sense of love, whereas, with an intimate relationship it's as if I can't fall in love. There have been many guys and I have been in relationships but I have never loved them and if we went a while without seeing each other i didn't even miss them... I am not in love with my current boyfriend but I'm afraid to break up with him and I would rather have him break up with me... It's been so long that I don't know if I cannot be in love or if I just haven't found the one. And if I just haven't found the one I am afraid I never will if I always feel this way towards the people I date. I want to have kids and a family but I just don't know if I will be able to find someone to have that with...