I've been rumbled!

For the past few days one of my friends in school kept asking if I was gay, the reason being that apparently I said I was to one of my friends in another friendship group (not exactly true, but I do kind of act more like myself with them). I denied it repeatedly until on Friday, he said -hesitantly- "******* showed me your tumblr, why is there so much gay porn on it..?"

At the time I kind of hurried him away but then I ended up going round his later at his invitiation, where he asked again and I replied with "that's kinda obvious...". He was fine - saying he still loves me and asking if I want a cuddle lol. But from what he said, everyone in his friendship group - a HUGE portion of my year (grade) - has pretty much seen it and been talking about so essentially people now know. Things are so much better with him knowing though, I felt closer and could be so much more open and didn't have to pretend to like the provocatively dressed women on the tv when I was with him.

I've not really cared about the school knowing for a few years now, but people in my year know my sister (the year above - now in uni) and there's even some people from her year as they're re-taking the last year. I just don't want it to get back to her really, which could subsequently get to the rest of my family via her.

It's not even that I think they'd react badly, they all have gay friends and are pretty open about it, but I guess I just don't know if they'd be quite so open when it's their own son/brother. No matter what their reaction, the idea of having to tell them, or even confirm it, makes me feel sick.

I don't even know if I really need any advice, maybe this should be in the "coming out stories." I guess it's both a story and I could do with some advice at the same time - I told him to not mention it to other people but he can't guarantee other people that know won't and I don't know how many people actually do know. So do I just confirm it if people ask, it seems like a good way to do this... But at the same time I'm really scared of my family finding out...