<human>: Can you give me a shortened version of the text?

I'm not in a relationship right now, just seeking some advice on how to get that to happen.  I recently ran into a girl that I had seen a couple months ago waiting tables at a friend's pizza place.  She and I had a short conversation that had started with her making joke about my long hair (a dude here).  I thought she was cute, but had a girlfriend at the time so I didn't pursue her at the time.

Fastforward to a week ago where I ran into her at a climbing gym.  I said hi and she remembered me.  We climbed together & chatted for a couple hours and at the end of it all, we agreed to meet tomorrow to climb together again.  We did, and at the end of the next day before she took off she said, "hey I should get your phone number sometime" which wasn't at that very moment because she didn't have her phone on her.

I got her phone number after going back to the place she waited tables at and hanging out with her and a couple of the people that worked there as the place closed up for the night.

A few days later (today) I texted her to see if I might see her at the gym and told her I was going to be there around 8:30.  I never heard from her, but got to the gym at 9pm only to see her driving away with a guy in the front seat :(

What do I do?  Do I lay my cards on the table and tell her that I like her and that it was disappointing to see her driving off with another guy?  Do I pretend I never saw her and continue to try and build a friendship?  Do I say something about having seen her and leave the whole you had a guy in your front seat thing out of the picture?  I want so badly to be with her, but don't know the best strategy for getting the girl.
<bot>: Asked a girl I like if I would see her at a place we've worked out at together, never heard back, saw her driving away with a guy when I arrived 30 minutes late.  Need advice