Low self esteem

Does anybody on here feel highly of themselves? I have a horribly low self esteem, I ALWAYS FIND my self comparing myself to others including my fiancés ex and other woman. I pick out all my flaws & just cry about them. So insecure when it comes to my stretchmarks, my nose, I wish I had a bigger butt & etc. my insecurities have ruined well is ruining my relationship and my life. I don't even take pictures because I'm so self conscious... I always say to myself that I wish that I could be like all the other girls who are atonishly beautiful & photogenic and so forth. I don't even know who I am as a person :'( I just wanna be happy but it's hard to say that I'm beautiful when I feel otherwise when I look into the mirror and see others that look waay better than me