Am I ugly, because I was rejected by ugly girls?

Yeah so I was at a party and I went up to a group of girls that seemed like they were waiting for someone to come up to them. I talked to them for a little while and eventually asked if any of them wanted to dance. They all immediately at the same time said "I have a boyfriend". This, I know of course was total BS, because the chances of that being true are not very high. They were all overweight and not exactly hot in the looks department. I went up to them since I felt more comfortable than going and talking to one of the hotter girls. I am just confused why they all immediately turned me down. Am I ugly? I am 6' 3" and brown hair, brown eyes, never had a girlfriend. The only downside: I'm skinny. What do you think? Was I doing something wrong?

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Am I ugly, because I was rejected by ugly girls?
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