I'm so unsure of my emotions

my boyfriend and i havent been together long, but sometimes i have the urge to just leave him and break up with him because i feel like i'm not that into the relationship and there are other men who are interested in me and i think have better personalities than my bf but then whenever we get into a fight i'm sooo scared of losing him and idk what i would do without him and all of the sudden i become so in love with him. this makes absolutely no sense why am i having such weird emotions towards him.