These last words haunt me

2 years together. We had been distanced since her return from her two week family vacation in September . She left with our relationship going really well and she came back distant, pushing me away, depressed, and angry (In general and towards me). November came and after many failed attempts at talking since she “didn’t want to talk about it” she said “I don’t know maybe we moved on too fast and we liked that we gave each other what our previous relationships didn’t give us.” These words haunt me. I can’t get past them. I still don’t know why she said we and couldn’t just say I because I sure as hell didn’t feel that way. This is the woman I wanted to marry. I’m now broken.