Girl pays for lunch!!

I'm a guy and I invited a girl friend for lunch and she said ya so we went to have lunch. We are good friends and we feel conferable with each other and she always seem in a good mood when we hang out alone. But when we were about to leave for lunch I had my money out to pay but she paid for everything. I got confused because I invited her but she paid. Why did she do that, is it because she likes me and is shy in letting me know how she feels or is it something else?
Girl pays for lunch!!
Add Opinion