Look, we have this discussion before.

I suggest behaving in a way that does not play into other people's reactions or behaviours - whether the source of their own reactions is based on your own regardless of your interpretation of them.

So, just go out on the assumption then that positive behaviour will result in positive reactions - don't give others the opportunity to respond in a negative manner to you. You owe it to yourself. Besides, how difficult would it be to be positive in the first place. Play the higher ground then. I am quite sure if you chose to be positive regardless of the behaviour of those around you theirs will shift accordingly. Be proactive. Just don't even give them the room or opportunity to think negatively about you.