Friend(20f) called me(23f) homophopic because I'm upset that the guy who confessed to me is seeing others. What do I do?

Long story short, this guy who I've known since 2016 but haven't actively been talking to suddenly admitted that he likes me. A few days later he sent me a snap where he's cuddling someone shirtless, but I cannot see much on it beside some silver jewellery on the person. I stopped chatting with him after that. He still sends snaps, and today he sent one wearing a silver, women's heart bracelet that sort of similar to the person's he was cuddling.
Like I normally do, I texted the group chat complaining about it, because I genuinely don't get why he's sending me snaps implying he has someone else too. I've already told them about the photo days ago where's he's cuddling someone, so I didn't repeat that. I simply complained that he's showing me he's wearing a girl's bracelet now despite supposedly being interested in me.
My friend (20f) responded with: "Wdym?"
So I explained how this dude sent the cuddling photo but I couldn't tell who he was cuddling and now he sent the bracelet that I took as him hinting obviously that he's seeing someone.

What my friend got from this is that I am not aware that sexualities exist and that I'm being unreasonable and discriminating for being upset at him for wearing women's clothes because he isn't comforming to what is considered masculine. So I explained again that, no, I'm upset because he's obviously wearing someone else's jewellery and hinting at a relationship while trying to also get with me. To that I got the response: "But did he tell you it isn't his own bracelet??"

I've seen the way this guy dresses for the past x years and he's never worn any bracelets before at all, so naturally I assumed it belongs to a girlfriend and he put it on to show me.

So I tried explaining why I'm upset again, but my friend is still stuck on me calling it a "girly heart bracelet" because it sounds like I'm insulting him for being feminine and putting him in a box assuming he's straight.

I assume her reaction is because she herself has a girlfriend right now and isn't someone who dresses very feminine, but I literally don't know what else to tell her or how to explain beyond what I've already done because she doesn't seem like she wants to hear it and keeps repeating that I called it a "girly" bracelet.

For now I've just stopped replying to make sure I don't lose my temper but I feel upset that after being friends for 7 years she assumes that I would try to insult a man for being feminine when I myself wore male clothes and had short hair for the first 3 years of our friendship.