SUBREDDIT: r/Advice
TITLE: What are his friendship/dating intentions?
POST: I feel like this is a boring question, but I'm seriously confused. I met this guy a couple times with mutual friends hanging out/at parties. The third time we hooked up and he was sober. He got my number a bit before the hookup and I figured he was a player and didn't expect to hear from him and it didn't bother me.

He then texts me and continues to text me wanting to hang out disappointed when at first I said we weren't going to be able to. After flirty texting we end up hanging out with his best friend and my best friend and I thought it was normal semi double date hang.

While we're out he's openly getting another girl's number and it's like we're all just friends hanging out.

What does this guy want from me? We weren't friends before we hooked up why would we be friends after? Is this common behaviour and I'm just oblivious?
TL;DR: 
Why would a guy meet a girl, hookup and then try to hang out for weeks just to be platonic friends?