If you feel it, or even question that you are, then yes, there is some emotional manipulation going on. To test the waters, say “NO”, even if it’s for a trivial thing, and don’t back down. The other person will take your “NO” (“Will you buy me a Coke, I have no money”) as a personal attack.

“Why won’t you buy me a Coke? You are withholding. Are you mad at me? I know you have $$. I’m really thirsty. I can’t believe you won’t do this one small thing for me. Well Jane, my best friend, has always bought me Cokes, I’ll ask her. ETC.!”

Or, your “NO” may be met with profound, ruminating silence. They’ll know that you’re on to them, that they’ll have to change their ways.

Or, they will disappear at the “NO”, never to be seen again.

Or, $$ will be missing from your wallet, exactly $1. And an empty Coke can will be next to your purse.