So I have a co-worker that I am interested in and ever since we met, we have hit it off pretty well. The thing is, I was going to ask her out, but our schedules have changed and I no longer work the same shifts as her. Anyway, I made an attempt to ask her out when I came in on one of her shifts, but she was too busy for me to talk to her, and that is usually the case where I work. My other strategy was to call her, but she never actually gave me her number. I have her phone number because they gave us all a list of co-workers numbers, but I don't think I should use it. Do you think it's ok to call her and ask her out, or should I find another way?