This is how I can see Destiel becoming canon. SLIGHT ANGST YOU HAVE BEEN WARNED. ~*~ Supernatural last season: All has been resolved in heaven, and it is time for the angels to withdraw themselves from Earth. Sam and Dean don't know of this. Sam prays to Cas for help on a case.

[Destiel Highschool AU] Castiel Novak notices a new kid in school. He has sandy blonde hair and green eyes. Cas is intrigued by him and immediately seeks advice to befriend him. He not only becomes friends with him, but realizes this kid is his only true escape from his thoughts and life itself. Cas becomes this boy's personal escape, as well, in more ways than one. Do not read if you're sensitive to self harm, death, or abuse.

The sequel to His Escape. After the accident, Dean is different. He creates a fear, he feels pain and suffers from it frequently. He's changed in a way Cas doesn't understand and Dean refuses to expose to him. Change begins to occur in all of their lives. Memories arise and people begin to change, all while Dean and Castiel finish their final year of high school. Do not read if you're sensitive to self harm, death, or abuse.