I apologize in advance for the long back story.
There is this HB8 supervisor at a restaurant/bar/club that I go to once a week at the same time with my one buddy(insert alcoholic/loser joke here

). Long story short, she basically spends the majority of the time that I am there at our table flirting with me and i obviously reciprocate. It has been like this for the past 3 months or so.
I saw her randomly outside of work about 4 weeks ago and asked her out. She said she couldn't because she was seeing someone else. I played it cool and was like "I never asked if you were seeing someone, but I will see you Tuesday(the normal day)." Nothing changed on either side at the bar and it is not awkward, for me at least, whatsoever. I never bring up what happened and continue to act the same way I always have around her. So she knows I hike, and 2 weeks ago tried to invite herself to a hike I already had planned with my friend. I told her she could come along if she wanted, but we were going early the next morning and she didn't want to get up lazy. So last week comes along and she comes over asking when we are going hiking. I never really answer her question, but get her number at the end of the night.
On Thursday I text her, and we make tentative plans for Saturday depending what time I was home from a family thing in the morning. I text her that I'm going and where to meet about 1 hr before I was going because when I knew for sure I could go and she doesn't respond. So a group of us go to the bar yesterday to watch football and she is there working. She sees us, but doesn't come over until she absolutely has to in order to change the TV channels by us. She acts like she had not seen us, and immediately starts to justify not texting me back. Mid sentence, I stop her and tell her that she doesn't have to explain herself to me. After that, she keeps coming back over and re initiates a hike for this week. So again, we have a tentative day based on if I have to take on another client on the specific day.
Two questions:
1. Have I been friendzoned already!? I think the "seeing someone" was a shit test and she had no reason to act awkward after not responding to my text.
2. What constitutes a flake? Our "date" was tentative, and this one is as well.