A girl lied and ruined my night. Why?

Story time. (TL/DR at the end)

I was at a rave on Friday with a small group (2 girls, 3 guys) for the first time in a while, and honestly had no intention to ‘pick up’ any girls. I was there to enjoy the night and dance my ass off, having not been to a rave in a long time.

I was dancing with my friend who happens to be a tall, attractive woman. There were a group of girls in our ‘section’ that slowly made their way to dance in front of us.

One girl, I’ll call her D, did was dancing in front of me, looking back at me, and backing up so she was basically grinding on me. Normally I’d have taken the signal and rolled with it, but I wasn’t interested, and it was to a point that we couldn’t really dance properly.

When I rave, I like to go for it, especially if I’m enjoying the music.
I’m not jumping around and bumping into people because well, I’m not a dickhead, but I need a bit of room.
So I said (shouted really, to be heard) to D something along the lines of “I’m sorry I can’t” but I was pretty drunk so I don’t know how it came across. I did ask my friend after the fact, and she said I was respectful as could be.

So she smiles and moves away, we got our my space back, great.

A bit later a girl in our section caught my attention, it wasn’t just that she was attractive, I honestly liked the way she danced. She was less aggressive but whatever ‘signals’ she was giving out I moved forward, she move back and we danced for a couple of songs. I needed a drink, told the girl I was going to the bar and that I’d be back, she smiled and nodded.

I get back to our ‘section’ and rejoin my friends, she is gone. We were in the same bit of the crowd, but she wasn’t there. I was upset to be honest but meh, it is what it is.

So I’m pretty drunk by this point, but the B2B set comes on and I lose it, banger after banger, the set was amazing. Anyway…

I locked eyes with a girl in the group  next to us in the crowd a couple of times and she was beautiful, like strikingly so, and being full of Dutch courage I danced over and told her some bullshit like “you’re so beautiful, I couldn’t keep my eyes off you” can’t even remember exactly what I said, I was pretty messed up.

To my absolute astonishment, she laughed, grabbed my hand twirled around and began dancing with me.
I’m on cloud 9 at this point, literally thinking to myself how could this night get any better.
We danced until the end of the set, then walked to the side where it was less crowded, started talking and at one point she leans in and kisses me. I nearly fucking melted into a puddle right there.

She leads me back into the crowd, we’re dancing away but I see one of my boys not looking great, so I go to check on him. A couple of minutes later I go back to find that D (for dickhead) has appeared out of nowhere and talking to the girl I was just dancing with. Alarm bells start going off, so I go straight over.

The girl I was just dancing with looks at me like I’ve just taken a shit on the dance floor. According to D, I was at the rave with her friend/my girlfriend and I’d basically ran off on them.

Now, not only does that not make sense, but I’m wondering who tf she’s talking about.
Turns out her friend, and apparently my gf, is none other than the girl who disappeared on me earlier.

I try to explain but in my messed-up state it all comes out as gibberish. The girl then speaks to her friends, who all look at me like I’m a piece of shit and vanish into the crowd.

Wounded. I was literally lost for words, and it fucked up my whole vibe.
Needless to say, I left not long after, having had what would have been a great night, completed ruined.

TL/DR
A girl, who I’d never met before, lied and said I was at a rave with her friend/my gf which completely ruined by chances with a beautiful girl and my night as a whole.

Now…

1.)     Why? I’ve genuinely not stopped thinking about it, and it’s really pissed me off.

2.)     Did I do anything wrong?

3.)     Have you ever had anything like this happen?