Hope you guys can help with this, I think it's fairly old, but wonderful.

Sam and Dean are not brothers, but they meet when Sam, who is just a kid, has a vision involving Dean. He keeps telling his mother (aunt?) that he is waiting for his friend, Dean. They are at a beach, and Sam and his mother (aunt?) take Dean out for ice cream and keep him away from his hotel room. While they are out, a demon comes and burns it down (John is gone for the day) and he comes home to find the room burned and Dean out (against orders) with Sam. Sam's mother (aunt?) is a witch, and she helps John and Dean (and later other hunters). I think they live in California? Anyway, Sam & Dean stay in touch and sometimes John lets Dean stay at Sam's house.

Sam periodically has visions, mainly about Dean when he's going to be in danger, and gets bad headaches afterward. His mother (aunt?) has special tea to help him with the headaches.

As time passes, Sam falls in love with Dean. Dean resists, but ultimately falls for him, too. There is some kind of difficulty between them and Sam leaves home after his mother (aunt?) is killed (by demons, unbeknownst to him). I recall him coming back to his old house after several years? He and Dean are reunited.

I hope someone recognizes this one, I would love to read it again. Thanks in advance!

Update : found! Far Away by Delnach http://delanach.livejournal.com/15041.html