Hey halfmarco8! welcome!
As TonyWK has said, it is a numbers game. You may just need to be patient for a little while.
I'm 47 and came out just 7 months ago after being married for 20 years. My wife was my first/only girlfriend/partner, so I get where you are at - I'm there now too that we've separated. I have a son your age, and a daughter a little younger.
I'm really happy for you though, that you have the strength of character and confidence that you are openly gay at school. No-one knew I was, until I told my wife back in May.
I can't really give any insight for meeting someone at your age - I was single until I was 25 - but I was hiding. Someone with the qualities that you show here, will no doubt find someone - I am a firm believer that good things happen to good people, and usually when they are least expecting it! or even looking for it for that matter!
I'm guessing that you're in year 11 or 12, so at the moment you'd have exams etc to get through, so I wouldn't worry about being single just yet, you have your whole life ahead of you!
As Tony said, solidify your current friendships, make new ones. There IS someone out there for you, you will meet them.
take care! and keep posting if you need to!