Instead of complaining about someone's behavior toward you, it is more constructive to work on your own behavior toward him.

Ignore another person's grouchiness and anger, and speak cheerfully and with compassion. If you find this difficult, pretend that you are an actor on stage. Adopting this attitude can keep people from much needless quarreling and suffering. Do it consistently and you will see major improvements in their behavior toward you.

Be flexible. People differ greatly on what they evaluate as "positive," and it is necessary to understand the unique needs of each person you're dealing with. If one approach is unsuccessful, try other approaches. But keep trying.