Met a girl in my social circle and we've hung out socially a few times. A couple weeks ago I asked her to get a drink the following week and she said yes and handed over her number. Then she got really busy and the holiday hit so we never connected. I waited until the next time I saw her at a social event to contact her and we picked up where we left off. Unfortunately there has not been very much flirting, but she's a bit reserved and "good girl." I validated myself to her friend a lot that night and I could tell the HB was appreciating it. I decide to bring up how I never heard back from her and she suggested we get coffee the next week.
I text her to set it up after a couple days and we have this very fun, semi-flirty text exchange. Then we meet for coffee and it was great. She kept extending it by ordering food and then dessert. She always reengaged the conversation when we hit small lulls, I let her talk and she opened up a lot. My biggest regret is not escalating or kino during this coffee. One of the things we talked about was that some of her friends who had moved away were coming to town and their group were doing stuff every day. Considering this, I didn't lock in a next get together. But the next day I texted her "Hey there, just wanted to say I had a great time with you last night! Hope you have fun with your friends this weekend.

"
She texted back hours later with a simple "Thanks!

" which caused me some whiplash. It was a great, fun coffee and she kind of just dismissed what I said about having a great time. I sent back a funny text and she responded but it kind of died there. I feel like we have a good comfort level and she must know that I'm interested in her because of how I followed up on setting it up. She came to the coffee and had no desire to leave (I ended it after 90 minutes, actually). I probably made a lot of mistakes in not escalating to let her know my intentions, but she kind of is hard to flirt with... like I said, she's got this good girl persona and I've heard from friends she gets frustrated with guys just interested in her physically.
I may see her this coming Wednesday, but will definitely see her at party next Saturday. Where should I go from here? How can I avoid the friend zone and get something going with her? She's going to her parents out of state for 2 weeks around the holidays so I have a bit of a time dilemma with a second "date." Help!