Been dating my girlfriend for the past year. She has always been extremely faithful and loving and caring, always being proactive in doing things for me. I think she has some abandonment issues since her parents divorced after her dad abused and cheated on her mom. And she doesn't have a ton of experience with relationships.
Back to today...
In the past week and a half, my girlfriend has had dinner with, gone rock climbing with, and tried to set up a lunch with a single guy friend of hers. Without telling me. The first time, she told me off handedly days afterwards that she caught up and had dinner with him, so I thought it was not a big deal. However, when she went rock climbing with him, she told me she was going to "workout" and disappeared for 2 hours. When she came back, she said "actually I went rock climbing with friends" and later when I asked who she went with, she admitted it was this same guy and a friend of his and that they also tried to set up lunch earlier in the week. She proceeded to apologize profusely and said she's just friends with him, she doesn't like him, etc and cried all night. I can't tell if she's lying or what. Am I over reacting?