<human>: Hello everybody!

I am finally confident enough and I will approach a girl that I've a crush on. We see us nearly everyday for more than 1 year now. We exchanged eye contact (and perhaps some smiles, not sure) sometimes. She is together with her girlfriend (who is nice as well, but I have a crush on the other one :D ). 

So, I will go up and say: "Hello! Can I ask you two something?"
If they say yes, conversation will start, and I am confident that I will get into the flow. But how exactly should I continue? I mean, if she would be alone it would be easier, but she is always with her girlfriend. For example, after days of talking ( we see us 5 days a week) I will ask her for her number. But what about the other girl? I mean, they are both probably really good friends. So?

I'd apperciate any advice! :)

Give me a shortened version of the text
<bot>: Going to approach 2 girls soon which I see for more than one year now every day. How should I proceed? (Have a crush for one girl)