obsequioid
An obsequioid is someone who acts like your best friend but also your worst enemy, all while making you feel bad.
My neighbor is an obsequioid. He says he’s my friend, but he talks shit about me behind my back.
My teacher is an obsequioid. She praises me in front of the class and then gives me the hardest test.
My ex is an obsequioid. He texts me every day and then says I’m annoying.