I haven't read the whole thread, but I don't believe it's really an 'accusation' if someone thinks or comments or gossips that they believe you're gay. They're just saying, that's all. As misguided as their little judgments may be, I wouldn't consider it an accusation as such. If they were 'accusing' then that would just make them homophobes and not worth your time [unless you wanted to say something to them]. People think all kinds of crazy things, nothing's going to change that.