I'm sure that's absolutely not true, it sounds like you're putting yourself up against coventianal beauty standards but beauty is in the eye of the beholder, I'm sure there are plenty of people out there who disagree and I'm certain you're not ugly. Anyway, getting into a relationship involves more than appearance, it sounds like your lack of confidence and low self esteem may be holding you back, keep in mind that you are an amazing human being and anyone would be lucky to be with you!!