I say don't worry about it... you tried your hardest and it blinded you to what she really was. Don't beat yourself up over it, and it's natural to feel angry towards her. You're feeling hostile because you feel played, like you were lied to. Just ride it out and give it some time. Pick up a new hobby, look around for other people, just overload your schedule with things, you'll feel better shortly. If not... then we'll think of something else

.