Use your brain that god blessed you with I know your smart.
The only word I'm seeing that could be an adjective is the word "old".
(Correct me if I'm wrong, thanks!)
Have a great day!
There are many kinds (can't name them all off the top of my head)
1. Telling someone you'll keep it a secret and then tell anyway...
2. Always being there for someone and then not
3. When you cheat on your husband/wife or someone you're in a relationship with
4. Using someone just to get some
Those are all I can think of (at the moment). But you can just pick whichever one you want.