Need Help

So, there are two Grocery stores in front of my house (Let's name then store A & store B), I mostly go to store A to bring groceries, but today I went to buy something, but they were out of stock, so I went to the store B, and mostly there's an old lady sitting in the store, (The ladies Husband died in a accident many years ago, so the store is the only thing there house is running on), and if sometimes the old lady isn't there, then her two daughters sit in the shop, I know both of them (we are good friends). What happened today is, when I went to the store B, I saw one of the cutest girl I have ever seen in my life, I asked her where have the old lady and her two daughters gone, so she said they have gone out of station, so I am here temporarily taking care of their shop

Guys I immediately got a huge crush on her, what should I do?? Please help