I can see where Texas*princess is coming from but if I may ofer a slightly differing guy perspective?
About T*P's point number one. I read lady pi phi's story and nowhere did I get the impression that the boy in question wanted a deeper relationship. Or that it was his desire for a deeper relationship that may have kept him celibate in Cuba.
However, I did get the impression that Lady Pi Phi wants a deeper relationship with the boy and wants/thinks that he desires likewise.
As to T*P's point two: He may have hooked up but if he did he probably wouldn't have said anything at all.
More likely, he didn't hook-up and felt inhibited a little looking around because he is somewhat invovled with you. Maybe even a little guilty.
Then when he got back he felt guilty about NOT hooking up. And probably blames you a little. Which is why he said something to you.
You see guys are strange creatures. We kind of believe that if we don't really try to hook-up with a girl, it means we could have had her if we had tried.
Its an odd assumption, but there you go.
Anyway, thats probably what it meant.