I have a question about social interactions. I wasn't hitting on this girl or anything, just having a conversation.
I've been eating at a local restaurant the past two weekends. I was walking around my college campus this week and actually ended up walking past one of the hostesses, who smiled at me. When I went there to eat today I waited to be seated and when she was taking us back to the table I said "did I see you in the student union the other day?" to which she replied "oh yeah, I thought I knew you from somewhere". Anyway, when I was leaving she was reading one of the appetizer cards or something and I said "are you so bored you're reading that?" She laughed and said "no, we actually have to memorize this stuff so I'm doing a little studying." I then asked her if she ever went to one of the local movie houses and proceeded to tell her about some of the stuff we had to memorize/do when I worked there. I was in mid sentence when some customers came in and she had to go seat them.
I wanted to finish what I was saying so I waited a few minutes for her to get back (sitting down on the bench messing with my phone, etc.) and then said: "anyway, what I was saying was" at which point another group came in and she kind of motioned at me to wait a second, to which I responded with a very casual "apology" since she was busy working.
Then I sat there for a few more minutes to try again. When she came back I tried to talk to her again but she did not hear me initially and then yet another group came in. At this point I just got up and left.
Like I said, I wasn't trying to hit on this girl at all. While she was friendly and didn't act weirded out by me at all, I don't think she was showing signs of interest beyond that. All that being said, did I do anything socially inappropriate? Should I have left after the first break in the conversation? Should I have left after the second break in the conversation? I imagine sitting there waiting for her to come back for too long would be kind of weird (or desperate/needy looking if I had been flirting) even if I still had my cool (wasn't acting nervous or appearing to be flirty; just finishing what I was saying and then saying bye). How long would "too long" be if waiting is appropriate?
Thanks.