WHY DO WE HAVE TO BE PERFECT

Why are we expected to be perfect??? Everyday I examine my body looking at my fat. Wondering how to improve my body making  a mental check list. Hoping I'm good enough for my boyfriend. Why do guys expect perfection when we don't? Why can guys have a little belly but if we do they need to watch porn or look up "better looking girls" I hate being me. I wish I was just good enough. Ugh sorry just ranting and sad. Does anyone else feel this way???