Highschool Relationship

So... I asked 2 friends out to homecoming one's girl and one's a guy who's bi, he didn't come out until later. During homecoming week rumors started passing around saying that I was a Lesbian and it really bothered me and affected my overall social being. Turns out it came from a gay Senior leader who asked about my sexuality. I know I'm a very bubbly touchy feely person, it's who I am. I act flirty to everyone. It's 2018-19! Why is a older gay guy bullying a younger straight girl?! Gen Z is messed up. Is it legal for me to make his life a living hell?