Giving and expecting is something you can't avoid most especially when you are giving something that is too much, most especially more than you have. We humans are selfish to most extents, i think. whether you are giving anything to feel good just as you said.
Because you can feel good about what you did.
It also means we are thinking about our selves than thinking about who we gave.
Expecting is natural, we always feel that reciprocity has to happen one day and when a time comes and it doesn't we always recall and feel bad.
Giving and not expecting is for the strong, i wish we become more stronger.