I get the impression that he is giving me much more pleasure than I am giving him. How can I make it up?

Plenty of people have this feeling!  They marvel at the pleasure they themselves are feeling, and can’t understand how their partner could be feeling as good as they are.  But they are!  If it’s fireworks all the way for you, it’s probably because he feels the same thing.  Don’t make yourself feel guilty about it, it just means that he could be more sensitive to pleasure and it requires less effort on your part.  Don’t underestimate how you make him feel.