Went to the gym today.

Saw a 8/10 girl working out with some other guy who looks like he never worked out in his life.

I make eye contact with her and smile, and throughout my workout I see her glancing at me, like she was more interested with me than the other guy she was with.

Later in my workout, I ask them to share the machine that they were using, and struck up a conversation with them, such as asking them if they go often, and how long they have been training etc.

I noticed that she was making more solid eye contact with me, smiling, and I felt the sexual tension between us. At the end of the workout, I asked when she would next come and she said she goes nearly everyday, and the guy only goes maybe once a week.

We said our goodbyes, and I told her directly that i'll see her again.

I grab my stuff downstairs and notice the guy she was with was waiting for her outside the changing room, and I asked her if his friend was single. He said that's his girlfriend. Honestly, I was surprised a girl like that would be dating a DYEL like him and I just said "Oh shit, good job".

I'll probably see her again in the gym by herself since this guy barely goes with her, and I assume that that guy would tell her that I asked if she was single.

Did I fuck up? How should I proceed the next time I see her?