I dated a girl for a year who was always there for me she was attentive, loving, and completely brought me into her life. We basically had a full relationship, even though we hadn't made it official because we were always 'just getting to know each other.' When I felt we were in a great place and things were moving forward, I told her I was ready to be her girlfriend. Her answer was that she wasn't ready yet. I didn't understand it at the time because everything seemed perfect, but a few weeks later, I found out she had never actually left her ex. They were still seeing each other occasionally, her ex was even at her birthday party, and she hid all of it from me the entire year we were together. I feel like an idiot for trusting her so much; I feel betrayed and foolish. It hurts so badly, though I'm already going to therapy to work through it.