Confused

R called me saturday....then this morning again. We spoke for a while, he's asking why is it that I'm not calling him....I miss him so much. But I don't show it or let him know that. I act so normal when he calls but I know how it hurts me deep inside. Not even deep, it's on the surface but no one can see. I don't know if I should also be calling him as well or leave it as is...this is so confusing now...