Been on 4 dates together, now said she wants friendship

As the title implies, I’ve been on 4 dates with a girl who I connected very strongly with. We slept together after every date, and we vibed quite strongly sexually I felt.

She did however ghost me twice, each time a week long, before reconnecting and going on further dates. She has some mental health concerns, specifically OCD and depression, and has also in the past opened up about both her childhood trauma involving sexual abuse and abuse in her one and only ever relationship.

We met last week and following that our communication has been sporadic and there’s been a period of time where she’s interacted with my Instagram posts and stories, liking them, replying to them and such, but not directly replying to my messages on WhatsApp. That changed today.

The other day I asked if she fancied hanging out sometime, maybe catch a film at the cinema. She responded today, two days later, basically saying she’s down for it, but asked whether it’s okay to go as friends. She said she doesn’t feel like she has the ‘capacity’ for anything beyond this at the moment, that this week has been really rough but that she’d hate to lose our friendship as we get on so well and get each other.

Obviously this is quite the kick in the teeth. I explained last time we met that I’m fine with a casual, light thing. I’m still confused though. For example she says that she doesn’t have the capacity for anything more than friendship, but on Instagram she posted a story showing her listening to a song which is quite sexually suggestive, with the caption ‘me when’. So that implies that sex is on her mind, generally, so maybe she’s simply pursuing sex with other people?

Anyhow I’ve agreed to meet, and I was thinking about gauging her interest in something casual potentially or at least to see whether that can be a possibility down the line. Am I an idiot for suggesting this given her message?