I'm scarred for life

The last 10 years of my life as far as relationships goes have been hell. The love of my life for 5 years ended because he was cheating. Next relationship was 1 year he tried to kill me. Next relationship with an guy I've know for years we got engaged found out he was gay. Recent relationship of 3 years found out he was cheating and is still in love with his ex. he broke up with me via fb. I feel like I'm losing my self. I can't control my emotions overall I just feel hurt like no one loves me. What am I to.do???