<human>: I'll try to keep it short: 

Years ago, my best friend introduced me to another friend of hers in an attempt to set us up. I lived out of state at the time. The guy (let's call him Alex) surprisingly kissed me at a party at my house. We ended up sleeping together a few days later. I went back to where I lived out of state but had to return home due to a scholarship problem at school. When I came back, things just weren't the same with Alex. It was obvious that he was no longer interested, so I let it go. 

I saw him at a party a few months ago and didn't know what to say when he tried talking to me. I clammed up and probably seemed uninterested. 

Fast forward to a week ago when he added me on Snapchat, which I don't use often. Other friends are convinced that he did a quick add of all of his contacts, but he's apparently had the account for years. He hasn't said anything or sent me any pictures. I guess I'm not sure whether he's trying to rekindle the tiny spark we had (though I recognize nothing real actually happened before) or if he just happened to see my name in passing and decided to add me. Should I send him something first? Try to chat with him? Let him come to me? I think asking him would be too aggressive and could potentially turn him off. He's a sweet guy, and I want to see what could have been--- or what could be.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Slept with a friend of a friend years ago who recently added me on social media. What's his plan?