What would you of done?

Ok so I think I have made the wrong decision by leaving.

Me and this girl were on a 12 week course, we became close around week 5 and got along great. Smiling, laughing, which she thought I was funny. Messing around, with her threatening to tickle me and chasing me to get a hug. Once said she missed me on the bus, she jokingly said I loved her, tried to give me a high five, looked at me frequently, got mad at me, for slighest things, jokingly she she'd stalk me and would compliment me and sit next to me and although we were never put into a group within our team, would still find time to bother with me. She would also compliment how good my work was. On our last day, she acted cold towards me in the morning but then asked me for a hug, when I was leaving, which afterwards I didn't talk to her or even look at her, I just left.

Would you of asked to stay in her life or would you of left?