<human>: There was a girl I've known for a long time that I developed a crush for around the beginning of high school. 
We are and still are very close, she showed what I thought was interest, so I told her I liked her
I was promptly friend zoned, this was fine, no major changes in our relationship, etc
This was about 2 years ago

However, recently she has started flirting with me more, etc...
She is a naturally flirty person, so I wasn't taking much notice

The biggest red flag came at a small party we both attended recently, it was a few hours after she had a couple drinks so she didn't appear drunk and I had sobered up after eating, we had just had a coherent conversation
It was about 2 am and people were turning in for the night 
(we were both already arranged to stay at this friends house) 

She had the opportunity to leave and sleep somewhere else but made no effort to move and we slept together
she was touching me and doing all that bullshit
(nothing sexual happened, consent is a big fucking deal etc...)

Next day everything's similar to how life was before, nothing new

That night, she seemed slightly out of it, didn't talk all that much, and slept in another room, no conversation

I'm most likely reading too much into this, just want to know the next best move, are these enough signals to ask again? Has it been long enough for her perception of me to change? Confused and frustrated, could use some translating. Thanks

Could you distill the essence of the text into 1-3 sentences?
<bot>: Was friend zoned early into relationship with a girl/its been multiple years and we've stayed close friends/she is now sending me mixed signals/need help discerning