<human>: Title is a little exaggerated, but I honestly can't seem to figure this out.

Me and my boyfriend have a good sex life when we are together, we have similar libidos and we just have good sex, to be blunt. 

For the last couple months we've both been away in diff colleges. When we see each other, everything is all good. When we are video chatting, he used to be into seeing me taking off my shirt and teasing him, but for the last week or so he gets annoyed when I do that ("Stop it" etc). Whenever I tell him how horny I am and how much I miss him he becomes angry because he isn't there for me, instead of horny from the idea of me coming back? I sent him a naked picture this morning to wake him up, and he sent back "Damn" and fell asleep... is that normal? I thought guys would usually be pretty awake if their girlfriend sends them a sexy pic. 

Am I expecting too much of him? Am I reading too much into this?

Can you condense the text into three sentences or less?
<bot>: LD boyfriend isn't interested in naked pics/sex jokes when I'm away from him, we have great sex when we together, why?