Yearning for someone I never really knew

I met someone a few months ago. We spoke online non-stop for some days and agreed to meet up for a drink. She told me that she’d had a psychotic episode last year and spent 3 months as an in-patient at a psychiatric hospital. There was such a connection and fascination with each other in person. I thought she was beautiful, kind, had a lot of depth and there is no other way to put this, but I felt so seen. I have a lot of trauma in my life and experienced debilitating depersonalisation a few years ago. We walked by the water that evening, kissed, she held my hand and as we got home she wanted to see me again asap. We met again, and she seemed spaced out, different to last time but still very gentle. I drove us around and we had a picnic on a beautiful hill. We spoke of things we’d do next time and there were comfortable silences and subtle moments between us. She had mentioned that after release from hospital there had been a few drug binges, she evidently drinks alcohol on antipsychotics, and there had been a lot of casual sex with men in the last year, and she slept on her dad’s couch. This all obviously concerned me. She mentioned her birthday was the following day and she’d be back in her hometown to see friends and go to bars. I asked if drugs would be involved and she said probably not. We kissed goodbye, and I never saw her again. There were 6 texts exchanging pleasantries, but nothing more in the following days. A few days ago, she reacted with a fire emoji to a photo of myself I posted, and I simply replied with a heart emoji.

I cannot stop thinking of her after all this time. I’m struggling to understand what is going on psychologically. Is this all projection of an archetype onto a blank screen? Projection of having “been seen”, and of nurture and care. I’m so sentimental and sad, it’s embarrassing, I still care what she thinks about me…but I guess I don’t even really know her.