@Tibbles123 This is probably another thing you might not want to hear, but I feel compelled to mention it anyway, because it might help you make sense of things. In my experience, some people with PTSD do exactly this -- they move very quickly at first and speak of love and commitment and grand plans, and they generally give the impression that they are ready to settle down and be fully devoted for the rest of their lives. But they aren't, this is a sort of distraction or a way to make themselves believe in love and warmth. I did this myself many many times before I realized why I was doing it - I'd move really fast and then a few months in realize I was trying to deceive myself into feeling whole again, to deceive myself into feeling normal instead of feeling empty from the PTSD. I have a few friends with PTSD who have done the same thing. That's not to say that is what she was doing, or even that she wasn't sincere with you, but she may have simply been confused. And I think that if you go through a lot of the supporter threads on this forum, you'll see dozens of other supporters describing the same scenario -- really fast-developing relationship, fairytale like promises of love and devotion .... and then the sufferer splits.