I don't think the little man is the jealous cousin lol ;) it's pretty clear he's Mike, or at least part of Mike in essence, aside from the fact that he's named Mike in some scripts, for the movie actually I think, he says I am the arm, which isn't just a cryptic clue for Laura to recognize that Mike is coming when they're in the car, [the Indian cry], but comes back in the end of the movie [actual finished product], he puts his hand on Gerard's shoulder and they speak simultaneously to BOB...
I think that's where the nose gesture comes in, the mutual understanding, trust on both parts - Laura saw Dale as her saviour and wether that was BOB or not didn't matter at that time, she just wanted to trust him and let him help her, someone anonymous that doesn't know her but does care about her...like I said, even though she thought Cooper to be Mike, she didn't trust the actual 'Mike', and is using some sort of code to get around him knowing what's going on, the finger on the nose, the bend over to kiss and then whisper...so that's why she [the 'good' Laura] said I'll see you again in 20 or 25 years, meanwhile, face your fears, no matter what or who it is. He's facing evil incarnate, everyone has a dark side - Laura, Annie, Caroline, Windom and Cooper himself, 'one and the same' - evil...Cooper got messed up again having to face the Pittsburgh drama and screwed up, he got scared and started bleeding from what looks like fatal wounds, but yet lives to go back and give it another try, meanwhile achieving very little I suppose...maybe I should dig in Cooper's tapes, they bring some clarity to the whole mess...cause it's all Pittsburgh he's running away from in the end isn't it...
Older script did actually mention Cooper actually offering his soul to Bob in exchange for 'Annie's' I think...