Never trust them. Never. It never works out in your favor. They are pure energy, not needing food, water, or sleep. I've dealt with so much crap over the years with demonic and negative entities, it's just not even worth it.
Whomever this person is who is playing games with you---here's my advice. Absolutely freeze this person out. Send a binding spell. And watch.....with glee....because now you have won the whole war. People get really upset when they realize that they weren't important enough for you to get mad. They thrive on your negative emotions. If you remove the negative emotions, it DRIVES THEM UP a WAll!!!!! You'll stay safe (win #1), and drive him or her NUTS!!!(win #2).
Nice way of smelling like a rose, no?!!! You'll love it!