What Am I Supposed to Do?

I typically hate posting these things on Mibba, mostly because I know that no one cares about my drama. But I had to rant about this. I just have no idea.

I was best friends with this girl.
Then she dated three of my exes.
I forgave her after that, even though I didn't want to.
After some time, we became close again.

She came over today. And while I was changing in my bathroom, I left her alone.
We were going to go to a couple places, so I opened my drawer to pull my money out.
But of course, it wasn't there.

My first thought was that she didn't take it.
$40.
And although that may not seem like a lot, it is.
It's $40 over the limit.

I told her that I didn't think she did it, and she lied straight to my face.
She told me that she'd never steal. She wasn't capable of that.

We talked for a couple of hours. Eventually, I walked her to the bus, and she went home.
When I got back to my room, I found the money laying right at the top of the drawer.

Did she think I wouldn't notice?

It just sucks, because I trusted she wouldn't do that.

So, now, I'm here with nothing to do.
I don't know what to think or how to act.

Hopefully I'll figure it out.