Loukas - I know this isn't very good advice, but the best you can do is stick it out.
You should count yourself lucky you have such a supportive group of friends around you that will never stop liking you cos of a few hormonal changes, and the same goes with your family.
There is a reason people say the teenage years are the worst ever, you're bound to be feeling emotional (both happy and sad!) and sometimes it won't make sense.
You're still yourself, you know that, and your friends know that.
As for the guy you like - I say go ahead and do it. He sounds very supportive, and you can't do anything wrong by telling him.
Good luck.
Edit: About your parents - I think you should apologise to them for being out of character, explain you think it's your hormones and they will appreciate your attempts. I'm sure they already understand though
