Tickets are starting to shake out of the woodwork in lots of places. Check the "Tickets Offered" board here. Craigslist, local Burner groups, etc. Read the post at the top of the Tickets Boards about scalpers and scammers and how to avoid them. Never mark a PayPal payment as a "gift", for example. Deal locally when you can, possibly near a police station.
If your friend didn't communicate with you plainly, or hinted for a gift or to pay in installments and was less than clear about it, that's her mistake. It's unfortunate, but you're not at fault here. Tell her you'll wait for a response from Ticketing, clarify the terms of her payment if things pan out, and tell her that the next time something like this happens, she needs to cut you a break and spell things out for you.