I've been thinking this since last week! lol

I really can't believe he's gonna have something with Rose now... after what he told Elena I can't believe. Before, when I had no clue he was going to tell Elena what he told her, I totally pictured Damon and ROse having a one night stand or something but now I don't know...

it will mean nothing to him..

He's going to get with her because he's stepped down from the running with Elena, and so he'll try and forget and/or bury his feelings for her and his confession to Elena was in a way, him saying goodbye, so I can very easily see him coping with that by sleeping with another woman, and it was very telling when Rose said I more have a thing for bad boys, plus she just lost her companion of 500 years [Trevor], so she'll be wanting some solace and comfort too, and I think ultimately it will stir feelings of unrest in Elena, I think from now on, her growing feelings (for Damon) will be at the forefront of her mind, though at first she won't know why, I don't know when she'll regain her memory of Damon's little visit, it could be when/if she turns, or maybe she had ingested some vervain beforehand, but I have a feeling it'll be sooner then we think.

I wish Elena would be jealous =(

Yup, it will be them seeking some comfort in each other!
Damon cause of Elena, Rose cause of Trevor.
I don't think it'll mean anything to Damon tho!

I can't even think of this right now, after the scene *speechless*

I doubt Damon would try to make Elena jealous at this point because that would mean he was still trying to be with her. We know he loves her, but from what he said in lastnight's episode it sounds like being with her is something he's trying to avoid. If he does sleep with Rose it would only be to distract himself: that is his pattern.

I think that much is obvious. It'll probably be just meaningless hot vampire sex!! :P

I think Ceraluv01 has it spot on.