yes I used to be a similar case to your boyfirend crystelle.. while I was growing up I almost NEVER cried- not even when my grandparents died. (strange, like MJ's dad I have pisces moon too)In fact my sun and moon match MJ himself..!
I used to get these panic attacks whenever there was bad news becuase i was afraid that i wouldnt be able to cry in front of everyone and everyone would think I was heartless. Im sure my parents did.
Im not very good at reading charts.. so all i can say is that it could it be due to the the way he was brought up? Have you spoken about it?
I mean in my case I grew up with a pretty hysterical mother and so learned to hold things in to avoid making any situation worse.
But after I moved out, I started to become really emotional! I guess my mind was subconciously feeling a "release" or something, like it was finally safe to cry.
Honestly I cry at everything now - puppies on tv, charity adverts, you name it! its great