HE FEELS NOTHING?

My boyfriend always says he can't tell me how he feels cause he doesn't know how he feels?

I don't understand it, it makes me feel like he feels nothing for me but he's too scared to tell me? I might be over thinking this but has anyone else had this problem?

When we are together it's fine, we go out and we spend time in the house, cuddling, watching tv etc

I'm a very verbal person and love words so having someone who can't express himself is tough!