Originally Posted by
misombra 
he's keeping you on the line. or as they sometimes say, keeping you in the parking lot.
he doesn't want you to go anywhere. but he doesn't want you around all the time either.
I don't think this guy is "pocketing a lay".. He was attracted to her, after he got to know her, he started to like her and sympathize with her.. Maybe he cared for her, or maybe it's a new style of gameplaying to call 7+ times in a day.. who knows..
But facts about her and her history started to be less overlooked.. he started to realize the reality.. that this was most likely a situation with not only no sex.. but also the possibility of her feeling very negative towards men (that would be him) and sex in general.. He started to reconsider the facts a little bit.. and the way Yelena presented them, didn't sound too appealing.. so his interest in her took a serious hit..
Maybe he's still trying to determine if this is how she will be in the long-run, or if she's improving, if she feels she's getting better, if it's something temporary and something they can make progress with.. He is basically trying to find if it's something he's going to have to deal with by being in a relationship with her, or something that he can help her get over.. If he can't find a good answer to those questions.. soon.. then it's game over.. It could be that he's still looking for answers and clues.. OR.. it could be that he has already been satisfied with the information he already has.. and based on that, wouldn't be interested in taking things further.. so it's only a matter of time until Yelena finds out that he's no longer pushing.. but is just being polite.. It could be either one.. not enough info to tell for sure..