@madra_b I was a little confused, because I didn't remember very well what happened before, so what you said was a great help! Now, I agree with you... He has no confidence on himself, and it's understandable. Sometimes, it seems he wants to give it a go, to belive, but his traumas make him back off. In certain point of view, it's very noble of him to try to protect her from his vague (romantic) feelings.
So, he is character who needs time to grow and be able to face someone honestly. When that moment comes, I think it'll be more wonderful than a fast and easy going relashionship.