Before those girls said you were weird, YOU said you were weird, to yourself. All they did was mention it, and they scraped open that wound you have. You know, that self defeating wound that calls yourself weird. All it takes is one mention of the word to make you feel like ****.
I say screw it man, next time those girls are around, be even weirder. Show yourself that it doesn't matter what those girls think. I know that advice sounds weird in and of itself. But, the truth is, no advice i can say will help you. You just need to keep putting yourself in these situations, and eventually you will figure it out for yourself. The only thing i can say NOT to do is to avoid situations like this, so you won't feel like crap again. All that does is hides the wound, but it will always be there unless you face it.