1) is a Kurt Au, that featured another character named Lizbet I think, and Kurt ended up seeing different versions of himself in different dimensions. I think it was part of a series, and in the sequel I think he ended up being de-aged.
2) The second fic is a Kurt and Finn brotherly fic, I think it was something like five times Finn or Kurt slept in the other's bed, and it was purely platonic and showed them bonding and getting closer as brothers.
3) The third might be titled "how can things go wrong if the year starts off so right?" where Kurt;s birthday is near/on new years so they have a new years/birthday dress up party. I know that it was a Klaine fic, and that Blaine dressed up as Clark Kent.
Thank you very much!
Edit: Fics 1 and 2 are found! Thanks very much.