Why didn’t she try to have sex with me?

I have been spending a lot of time with this friend and we have opened up about everything and complimented each other. She’s flirted with me a few times but she told me she she’s flirted with friends but lately it’s felt like there’s been more than that. She’ll give me a lingering gaze and touched my veins and compliment me. Once she was like “I can’t believe we just touched hands” and someone got awkward and she claimed she was “joking”.
I went to her family’s house on Saturday and her and I went off to the side a few times to talk and drink and smoke a cigar that we shared. I ended up leaving around 9 pm because I was tired and also cold and I texted her that I made it home safe and she didn’t answer until the next morning ( she usually answers right away ). We didn’t rlly text the next day and when I saw her at work she told our other friend how I left her house early. Also she told me how after I left, a guy that I had been socializing with at her house was interested in me and asked if I was single. My friend told me that she told him I had just gotten out of a relationship and also she told me she played the bi card and told him my sexuality. ( I’m bisexual and so is she ). She didn’t tell me this info until 2 days after. I get off work at 8 and we were going to do something with another friend Friday but the other friend cancelled so my friend asked if her and I wanted to just hang. She came back to our job to meet me at 8 and we went to my campus and then planned to go to a bar but I forgot my id. She then looked at me and said we could go back to her place and watch a movie and chill. Once, I told her my ex invited me over for a movie and she said that was code for sex. We went to my place and she told me my beer matched my outfit and she liked it but I don't know if it was a compliment. We talked while we drank and there were a few silences that felt awkward ( in a good way). She didn’t make a move and left after finishing her beer. Why?
Why didn’t she try to have sex with me?
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