Most Helpful Girl
1) He's doing it behind your back. The trust is gone and he doesn't care about you or your feelings.
2) This makes no sense, "he refuse to tell her about me even though she knows". So does she know about you or not, I don't get it?
3) He's hiding your relationship on Facebook.
4) You moved in together when you didn't even know each other yet. That's the biggest mistake of all. You shouldn't move in with someone quickly. A lot of relationships fizzle. When you move in together it's harder to break up and separate the property.
You moved in with a stranger that obviously wasn't over his ex. You are the rebound he moved in with and he's getting a 2 for one deal. It's time to break up. This relationship moved too fast and there is no trust.