Walked up to 8-9, awesome butt and legs, in the gym doing her reps on the leg extension and said excuse me what's your name? She replied Lacy. I said i am "Savupthundercock" you have amazing legs, she gets all giggly and I tell her that I'd like to get to know her better while handing her my phone, and tell her to give me her #. While she is entering her # in my phone she tells me she has a boyfriend. After a slight pause, while she is still entering her number I told her "that's cool, you can keep him around until you figure out you like me better" she kinda chuckles and says "right". I tell her "good meeting you have a great day", and go back to my workout. 3 exercises later she walks up to where I am at with the incline bench, waits for me to acknowledge her, I was writing in my PT Log, and tells me " you can still text me but my boyfriend is a good one, I am gonna marry him, and I am not gonna do anything to mess that up" I looked up at her and said fair enough. And she replied thanks and walked off. I went back to working out and then left for work. Later discovered that her # didn't save because this is the first number I got with this brand new phone and didn't know I had to pick a destination to save to. The Next day I get her # again, I tell her to enter her number again it's a new phone and I messed it up, she enters her name and number again while saying GG his is just for talking about working out. She hands me the phone back I say cool and get to working out. I send her a text later that night to have dinner with me at "awesome steakhouse". No response. WTF?

I still see her almost everyday at the gym, same workout schedule.

What was done well what can be done better, and how to fix this?