Help me.

Whenever I see someone prettier than me or sexier than me, I always think about how my man would like her waaay better than me. I just can't help but to imagine that he would definitely leave me for that person who's way prettier and sexier than me.

I usually just push people away in general when I see someone who seems so much better than me at things and I just can't help but to feel like I can't do any good for them or even for me. I feel like I'm so easily replaceable and it's so frustrating.