<human>: Can you summarize the given text in a few sentences?

As title says, she sent me a text the other night asking if I was busy, so we got to talking for a bit and she suddenly asked me "if I send you something on snapchat will you send me something back?" to which I told her it depended on what it was she sent

a few moments later she sent me naked pictures of herself

I was shocked, since we'd never been anything more than friends, so I asked her what this was about and she gave me a lot of weird cryptic responses

I told her I wasn't going to send her anything in return (as I have a girlfriend and have never been romantically interested in her)

now she has me blocked on facebook, snapchat, and phone

what do I do?

what DID I do?
<bot>: childhood friend willingly sent me naked pictures of herself and is now avoiding me in every way, shape, and form, and I don't know what I did or what I should do