I just got a girls number what do I do?

I just got a girls number!!! she's totally cute, short, athletic build blonde hair dark eyes the best butt and small boobs. she's in really good shape and plays soccer like I do. We work in the same building and then we usually go to the same gym after work down the block from the office. We often walk into work at the same time and bump into each other on the reg. We always say hi and all my co worker thinks she's hot!!! So i gave it a shot and asked her for her number and if she was going to the gym. She said yea and said I was cute and gave me her number!!! I have been on a few dates and had a prom date with a girl in HS, but that was last year. I haven't had any experience with a girl since. I am not really interested in dating but i need to do something this girl is totally hot!!! How do I handle this?

I just got a girls number what do I do?
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