Lack of relationship

So all of my friends have someone interested in them but nobody ever pursues me or anything and I sucks. I feel like I’m not pretty enough. I just wish someone would like me for once. At the same time I’m scared my mom got pregnant with my sister at 16 because it was an abusive relationship and it took her a long time go leave and eventually find my dad. And my sister got pregnant at 18 and the guy sucked. And then after that ended she found another manipulative douche who got her pregnant. It’s just like watching it happen to my sister and hearing about what happened to my mom makes me scared at the same time. I just don’t know...