Why i don't fw females

So one of my friends all of a sudden don't like me. She's told my brother that she beat me up a longtime ago (we fought a long time ago but we were hella young and it was only like 5 seconds) then she told him she could beat me up now. I'm very very sensitive and if you're sensitive to you can see why this got to me. Mama didn't raise no fool, so im not gonna whimp and cry about it but when i heard him say that I just wanted to cry because I'm so damn sensitive. Any advice on how to handle the situation. I despise fights and would hate to be in one.