<human>: Can you provide a brief rundown of the text in within 3 sentences?

My friend commissioned me to draw something for her that was pretty involved, and now owes me £35. I am an aspiring concept artist/graphic artist and this was my very first proper commission, so I didn't really know how to go about it, but she was extremely happy with it, and said that I did a great job listening to her and making it perfect for her. I had planned to show her low quality previews, request payment, *then* give her the high resolution finished piece, but it was the middle of the night and I wanted to get it over with. Still, she's my friend, it's not like she's going to rip me off right?
It has been 2 weeks now. I sent her an invoice the day after I sent her the finished piece, and then I sent her a reminder a week after that. She's not responding to me, and it's even more awkward because it was recently her birthday and I didn't get her a present (she's my friend, but I thought we had drifted apart quite a bit, and I didn't feel obligated to), still, it feels weird asking money from her right now - even though it's technically for my job. I'm also purely communicating with her via facebook, since she lives in England. What do I do?
<bot>: Did a comission for my friend, sent her an invoice, and a reminder, and she still hasn't paid me after 2 weeks.