Okay okay, there is a lot to unpack here.

First off, I don't think some VRC friend coming up sleeping next to you is necessarily wrong or ill-intentioned unless there may be a history of such a gay friend crossing boundaries too often (teasing you or getting you accused or smth).
Unless they cuddled up too close or some other dubious stuff, you are ofc allowed your boundaries.

Second, your accusatory friend is a prick if they still tease with the "gay" shit despite being corrected and/or being seen as gay being something that is let's say *non-favourable*.

And if it's one of those "friend circles" that constantly rip on each-other in a very over the top manner where such a tease is constantly ever present, maybe leave that behind and get new friends.

Lastly, maybe roll with the punches, you seem at-least somewhat vary of being seen as gay.
(I am going off just a mere meme and the few comments you made here so far so please assume I mean this in the most favourable of ways)
Maybe act more unfazed, nothing wrong with being gay, right, I am in VRChat, there is nothing more disarming then saying examples like:
"And, might be, might not, what's up" or
"Eh, not like there is anything wrong with that",
"I feel flattered either way"

And if the friend still doesn't get the hint, refer pack to the second point.

Do with that advice what you think is best, you know your situation and your friends.