OK, so a friend of mine has invited a few friends over, including me and my girlfriend. She's very unpredictible and never lies. She told me "no matter what, after james's (first friend) sleepover, you will love me as much as i love you. And that is to much to even describe." like I said, she's unpredictiable. She never lies. I love her, but sometimes she does the most unpredictable things. Like kissing me after above statement. I really have a bad feeling about this though. But, last time I had a bad feeling about something, she told me she loved me. I just need advice! Please help me!

I don't understand what you need advice about.

I don't get it either.
Is this the girl you couldn't get out of your head 3 weeks ago?

1. I don't see anything unpredictable here.
2. Nobody in the entire world 'never lies.'
3. You have a bad feeling about the girl you love because you are going on a sleepover. How would we have a clue why?

It's the "no matter what" statement that makes you feel uneasy. She's telling you ahead of time that her behavior at the sleepover might be questionable and make you wonder if she still loves you. No wonder you're suspicious. She's asking you for a blank check to "act up" at the party without consequences. If she does, you have a hard decision to make.

Oh, pwooden might be onto something.
No matter what could also means she plans a big surprise that she thinks you will like.
We don't know what you have 'done' with each other...
I don't like it either way.

https://www.askmehelpdesk.com/dating/why-cant-get-girl-like-out-head-771985.html

You will have give a lot more specifics and circumstances if you even want to be understood.