How can I appreciate the beauty in myself,I hate feeling bad all day..?

People say I am pretty etc, not being vain. But I don't think I am UGLY I don't think anyone is but I do FEEL SOOO UGLY so often and I am trying to stop feeling this way, I started feeling this way after I was heartbroken - especially as the guy I love/d is going out with a really pretty girl. Now, I compare myself and others to everyone else and it takes out a lot of my time. I know that we are like this http://media.onsugar.com/files/2011/05/18/0/1578/15781810/eb054376cf767494_Types_Of_Flowers_A.jpg all different and beautiful, different types of beauty etc and I know beauty is in the eye of the beholder and I know there is more impotrant things e.g. good health, good personality, being kind etc than looks - believe me, I know all of this. It doesn't stop the way I feel though :( So how can I feel better? I even went as far as posting my picture up on Y!A and I got good comments like 8/9..depsite all this I still feel ugly! AND still compare myself to others :(