I have a fundamental problem with the statement that HE doesn't ALLOW you to be nice to him.
He doesn't have that kind of power. You can be nice whenever you want to, however you want to. You don't need his permission.
Now if you are expecting something in return for that niceness, then I think you are not being honest. If you want to 'give' to him, let the effort of giving be your reward. If you are nice and giving to him, and are expecting something back in return, then you are trying to manipulate him. You are then trying to 'barter' with him.
That's okay, barter all you want, but don't wrap it up in the 'giving' package, and then get all mad when you don't get anything in return for it.