2) Kurt/Blaine - wow, the details on this one are really fuzzy. I know that there was a break up. I believe that Kurt was the more devastated one and after Blaine left, Kurt moved out of the apartment that they had shared together. Somehow, Blaine ends up finding Kurt and when he does, Kurt's like really sick/underfed. Blaine nurses him back to health kinda. I believe there was a misunderstanding about a play or something. There were group emails that were always sent and that's how Blaine even kept tabs on what Kurt was doing and he opened up one and it was Kurt's last ditch attemp before he did something drastic and it was a blog no one would think to go to because Kurt had kept it in highschool. Okay, I'm totally mixing stories up there. One or both would be great.
FOUND (link in commments) 3) Kurt/Karofsky - Dave is sent to couseling because of his issues and his therapist sends him to this website for peer help. He doesn't want to go but the doctor/his parents, though they can't see what he says can moniter if he actually spends time in the chat. Kurt is one of the people who talks to the troubled kids. He uses a fake name but as karofsky and him share stories they realize who the other is. They end up continueing to talk and get together.
4) Any long, completed, well-written, happy-ending (both characters alive and together or heading towards together) Kurt/Puck fics would be greatly apprectiated.