How to let go of a friends with benefit

When I was in High School I met a guy that I though was very attracted. We started talking and messing around a year after we met. We never date because we ended go to different colleges and it's pretty far but everytime we come home we can't help but to hook up. It been on going for three years now and I have met tons of different guys at college but somehow it never work out and I always come back to the same guy. I recently just met someone who is incredibly amazing. Someone that love me and I truly deserve to be with someone who is 100% wanting to be with me but when I kiss him. I feel nothing and that's make me upset because no guy ever treat me the way he does before. I really want to feel something with him. I want to let go of my friends with benefit because I'm not happy with this kind relationship that been on going for years. I know that deep down I'm in love with him but he's just not the right guy. He never serious about me and he never treat me right. I want to be with someone that potentially can make me feel secure. What should I do?