Something happens and John decides that this is it, he's got to move out and move on (any reason is okay, I guess. Maybe they've had a fight over something. Or there was no real fight, just something really upsetting. Maybe it's drugs, maybe John contemplates getting married and starting a family).
One morning Sherlock wakes up and realises that John is gone together with all of his belongings. He freaks the hell out and panics really badly.
Please, no pre-established John/Sherlock, but I don't mind the feelings (unrequited love is okay, too. I'm even okay if John learns that Sherlock is in love with him and moves out to avoid hurting him. Maybe Sherlock gave himself out in a fit of jealousy, I don't know, it's up to you). I don't mind a good ending, as long as John doesn't come back with his tale between his legs.
John moves out. Angst.
One morning Sherlock wakes up and realises that John is gone together with all of his belongings. He freaks the hell out and panics really badly.
Please, no pre-established John/Sherlock, but I don't mind the feelings (unrequited love is okay, too. I'm even okay if John learns that Sherlock is in love with him and moves out to avoid hurting him. Maybe Sherlock gave himself out in a fit of jealousy, I don't know, it's up to you). I don't mind a good ending, as long as John doesn't come back with his tale between his legs.