IIN that I think I'm ugly? Do others think that too?

Yes darlin. this is completely normal. Honestly i don't think i am pretty either. Personally i don't ever pay close enough attention to other people. I doubt other people see half of the things you dislike about yourself because only you really pay close enough attention to notice those things & that's completely normal. It's okay to embrace you insecurities because everyone has them but make sure to look at your good qualities too. Loving yourself isn't easy but it is important.