I highly believe in the saying "Fake it til you make it." I could stand in front of the mirror and very easily point out my flaws, or sit and think about every negative comment someone has ever made about my appearance.
But instead I have realised that a lot of people who are considered attractive all have one thing: confidence. As a result: hell yeah I am attractive. I am gonna take (and share) selfies, I am gonna wear clothes that make me feel good, and I am gonna believe in myself. As long as I find me attractive that's the most important thing. :)