I saw this chick that I used to have a huge crush on back in the day this weekend at a bar. We briefly talked and went our separate ways. She then showed up at this after party I was at and we played flip cup together all night. So fast forward to today at work (me and my brother own a sports nutrition store) and she comes walking in to buy some stuff. She stays a whole two hours (the store wasn't busy) and chats with me. Should I just ask her on a date or how should I go about this situation?