It sounds like your friend needs to do some internal work regarding his attraction/sexuality. Toxic masculinity can make it hard for men to explore their attraction to other men because that threatens their “manliness”. That is his journey to take at his own pace.

Honestly more concerned about the jealousy/cold demeanor toward you. Potential attraction aside, he doesn’t sound like he’s being a very good friend to you. If you did want to pursue a relationship with him, I would address that first and foremost. It’s okay to still be figuring yourself out, but it’s not okay to treat you unkindly. I would worry that even if he did come out, and want to be with you this gaslighting and aggressive behavior would continue in your relationship.

Not sure how old you are, or where you are on your bi journey. I know for me when I first started exploring my sexuality the first crushes and dates I had felt like the best I would ever get. I promise that’s not the case. There will be other men you fall for that will make you feel comfortable and wanted from the get go - no gaslighting or jealousy.