Why are girls this way?

Hello I just wanna get your views on this problem of mine in relationships and on me im 15 btw.:) ok so heres the story I’ve had four girl friends within the past five months. I don cheat or leave one girl for another thts lame. My first girlfriend ended up cheating on me by having sex with another guy. Then my second girl friend ended up leaving me because I didnt wanna have sex. And my third girl friend ended up having and abortion about four weeks into our relationship because she cheated on me with some guy she met at the mall. now I have my current girl friend who is perfect and against drugs and sex:d but everyone of my exs are calling me a sex craved bastard (by the way I am not into sex its well for older people like 20yr olds) and other names such a$$ hole. I just want your view on this crap.I wanna know what you think is the problem here please and thk you