Frenemy -- it's a silly word for a not-so-silly situation. Imagine if your friend, someone you loved and confided in, actually had it in for you. Sure, she'd put on a good face when you were around, but underneath, she was seething with hatred, bitterness, and resentment.
It's hard enough to be hated, but when you're hated by someone you trusted, it's a nightmare. The betrayal will cut you to the core.
Which is why you need to protect yourself before you give too much to someone, only to be stabbed in the back later. Here are some telltale signs your friend is really a frenemy (cue the scary music) ...