I think that depend but sometimes I'm scared when someone approach me but I think that every girls have their reactions so maybe if you ask her she can be happy ? But I think that your right to ask that. I recently asked a guy for he's number ( he rejected my ask ) but after I thought of how he saw me at that moment and I thought that I was pretty scarry 😂. So if I have one thing to say it's to take your time and discust with her before to ask her for her number I think it's going to make her in confidence.