[Rivière]

Based on what you've written, it does come across like he was manipulating you for one thing and that was it - sex. If he was really interested in the 'whole you' why would he behave in such a peculiar, withdrawn manner after each time you head up to the bedroom. If he liked and cared about you as more than just this, if you think about it, there'd be more emotional involvement from his side.

Sure, you could put it down to a dysfunctional childhood. Sure, each person's situation is different. However, how a person chooses to treat someone outside of that environment is up to them. It's his decision on whether or not he actually tries to make an effort with you. He clearly isn't.

It already raises a red flag to me regarding the fact that he started crying because you wanted to go leave for massage practice with the rest of the group. Maybe he has some mental health/emotional issues to work through, but this seems all very sudden and peculiar behaviour. Especially for somebody who has just known you a few days.

It sounds like he obviously has a lot of things to work through and maybe just needs a good friend. However, I do worry that you'll get emotionally roped into his behaviour and get dragged down by it. That's not good. If he does have genuine mental health issues, he should be encouraged to speak to someone or at least try and get some form of help.

In my personal opinion, it's entirely up to you how you proceed, but there are already giant red flags that demonstrate there's a lot going on with this guy than meets the eye.