Most Helpful Guy
Most of us are taught from childhood to hide our emotions, especially negative ones like hurt, pain, embarrassment, and also the most positive one, love!
Then come the traumatic experiences of break ups and betrayals later in life, on top of that.
Is it any wonder we tend to be shut down, most of the time?
Your guy clearly has had both experiences, and while verbally you may agree to talk about your relationship, in reality it's hard for him in practice.
Try to take advantage of quiet moments to talk just a little about how you are feeling, and he will TRY to respond. Encourage him but don't pressure him to be tender or emotional very much, or he'll get scared and pull away in reaction to the pressure.
Try to get him to open up just a little at a time, and then go sit in his lap or something to show how much it means to you to hear him tell you his feelings. Reward him when he opens up, in other words.