Why am i never enough to stay?

I feel soooooo broken right now....everytime I date a Guy he leaves me. I use to feel so beautiful but now I hate myself so much BC everytime I date someone they like me for a little while then fall off the planet. I already hate putting myself out there but I want love and I don't wanna live my life without being able to love someone who deserves and will cherish my love. Guys what makes you never talk to a girl again??? Plz be honest:(