Is he really bad at showing emotions?

Asking again because no one answered before.

We are dating, kind of.
Sometimes he says he missed me when we haven't saw each other for a longer time. But yet I didn't feel like he did anything about it?
Soon again we will not see each other for a long time. And I told him I really going to miss him. And he said 'me too'. But I told him that I don't really believe him, that it's just saying. And he became a bit sad and told me he is sorry but he is just not good at showing emotions.
What do you think?

When we are together he is the best he can be.
Is he really bad at showing emotions?
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