It's gonna be so hard to sum up my reaction to all that happened.

This explains it the best:

Throughout the episode, especially the parts with Dave and the crash:


The Warbler's performance of Glad You Came:



Sebastian's Voice:


People Shipping Dave and Kurt:


Blaine and Santana rapping:



My realisation that Kurt and Blaine were holding hands:




Me fangirling at each scene Klaine is in and shipping completly non-canon characters because they look cute together:


How I was worried why Blaine was so off in the episode until Klaine held hands because that makes it all better somehow: