Pig has pretty much hit the nail on the head.
Man, shrooms and psychedelics can do some pretty interesting things. Both in how your friend acted, and in both how you perceived those actions. In my experience, psychedelics can make you face every demon you ever had, and even a whole bunch you didn't know about (well, a wicked back trip will).
And again, Pig is bang on the money, just relax, don't worry about it. You're 22, you've got plenty of time to figure out who you are and what you want. If you're a lil unsure about your sexuality, don't stress. I think it's pretty natural / normal for guys to sometimes question their sexuality, even have urges. I don't think that makes you any less of a man, and certainly doesn't mean you're gay.
So fuck it dude, don't worry about it, it's a small random and weird event in your life that will go on the pile of many, MANY more to come
