Jeeze... You have it pretty rough, dude. Im really sorry. I knew this community was chock full of horrible, childish children but I didnt know it was bad enough to make someone leave. Well I did kind of... to an extent I guess.
But heres some advice to you, FH isnt highschool and you cant block out everyone. But you can laugh in their faces. Be the bigger person and walk away when crap like that happens. These people you talk about obviously have no lives and are 12 year olds that are spoiled rotten. Theres a lot of good people here. You just have to look. If you really need some friends (reliable) just post a topic somewhere, dude. Ask people, talk to people. Theres loads of awesome people hidden behind this... mixed community.
I know it'll be hard but just stick around. But if you leave, you'll just be helping them complete another mission of ruining another's fun. Once you make some friends, I suggest staying in a private map until you feel your ready to run into some n00bs. My friends and I stay in private maps for the exact same reason your upset. We dont want you, or any of our friends or good players to be in a pickle like that.
And another thing, looking for a mate on here is just asking for trouble in my opinion. Its stupid because people take it so seriously. When they pair their character up with another player's they take it as if the two players are in an actual relationship. Only a immature 12 year old (and sometimes older people) do stupid crap like that. I mean sometimes it could work out but thats just a bit much. I'm guessing thats the case with you anyway. People taking it too seriously when your just in it for the fun of it.
So yeah, man. Stick around. Things'll get better eventually. (Sorry for this long arse speech. xD Felt it was needed.)