A girl is sending me pics (not nudes)

So, this girl I know is consistently sending me pics of her. Selfies, mirror pics, even pics of her legs or nighties.

I guessed she's obviously interested and asking for attention, and she's is cute, and we're both singles, and yeah it turns me on. I'm not searching for commitment atm.

We always did cheap talking, nothing serious, but I thought "why not!?" so I started flirting more seriously and after a while she tells me she's not interested in anything casual.

So, honestly, this feels like bullshit. I mean, it seems like now that she got my attention she doesn't want anything!? Even if she seeks something serious it would make sense she would accept to go out or asks for a date or something, not just sending pics of her, right?

Already asked her several times if she wants to go for a date and she always has an excuse.

I don't want to hurt her ego but I'm in the edge of asking her what is the point of sending me those pics.

Any suggestion to how to proceed from here?

Edit: we're both in mid-20' with past relationships