No place for love in my heart?

am a cynical person and really dont care bout anyone but me. I really didnt even care when my parents died(shot). I am 18 now and people say I need to change. I have never really felt love of any kind, I must be the devils advocate or something. I believe that if I ever do fall in love that it will ruin the person I am. I cant have that. But I have been told that u cant control love it just happens, is that true and if so how do I stay away from it or get rid of it if I ever feel it