14 and pan help

Um, so two weeks ago I came out as pansexual. I’ve always felt like gender never mattered to me but I didn’t know how to label it

But ever since I came out, people have been acting...weird

3 of my best friends have already left me, calling me a slut and an attention seeker. And when we are in the change rooms the girls will look at me weird and call me a pervert even though I’m in the stall changing and can’t see them.

The boys have called me freakish and only one person still looks out for me: he’s always had my back and I love him to death, I trust him with my life and I’ve been crushing on him since we met a few years ago.

Please, help me. I used to have so many friends and now everyone is treating me like something they scraped off the bottom of their shoe.

I’m so confused, if anyone is willing to talk and offer some advice I would be so grateful.