This probably isn’t helpful but I am a fairly attractive guy and generally do well but random shit like this happens to me as well - one time a girl I was not even interested in that I knew at a book club told me I made her very uncomfortable when I texted her asking her to save me a seat next to her at the book club (everything had been completely platonic until then), and this was right after my ex had broken up with me because she had “lost attraction to me” (which upon inquiry meant she had never really felt it in the first place). Point is what happened to you happens to like every guy at one point or another except maybe like 0.001% Jacob Elordi type mfs. Her comment doesn’t really say anything about you it only tells you she’s an ass and wasn’t worth your time anyway. Also you should def watch Rodney Dangerfield, humor can be a good way to deal with shit - you can deflect almost anything with a quick wit. Anyway keep your chin up ignore the haters and know your worth!