I've been through that whole thing too. In your exact situation.
Blowjobs are probably a lot better than anal, only way to ask him is to just ask him. I'm sure he'll be up to try something, and if not, oh well. I don't think same sex relationships are very complicated when it comes to sex, very open. At least in my experience.
Although one of you will have to bring it up, and it may as well be you. Go for it. Also, anal sex unprepared is really nasty and not fun at all so it'll probably go bad if you just do something spontaneously.