Mom doesn’t like the boy I like

So there were rumors of the boy I like touching a girls thigh inappropriately at my school about 5 months ago. I got really upset because we were close friends and he knew that it makes me upset when people do that (obviously). I was upset and I talked to my mom about it and I talked about him poorly. We still don’t know if he did anything or not, but after a few months later he’s much more respectful. And now we like each other . He knows to never try and do something I don’t want to do with me (as well as anyone). But my mom is still upset about what allegedly happened, and I don’t know how to get her to see another way. Any tips??