Is this girl playing with me?

Anonymous
Im really good friends with this girl at work. We work together everyday, talk a lot, get along really well, flirt, everyone at work thinks we’re dating. I took her out to lunch like 3 months ago and it went well, only problem is that she just won't hang out with me outside of work other than that one time. I asked her to hang out casually on this thing she said i should take her to awhile back and she basically said she’s busy and “ill let you know” We had a joke about buying her food, she jokes about it to me saying “oh yeah what about that food you owe me” and ill joke “well ur never available” but she keeps giving me the same excuse such as “im busy with school” or sometimes she’ll just say “no” with an excuse.
She just playing with me?
Is this girl playing with me?
3 Opinion