I think my friend stole money from me?

One of my friends slept over last night and for some reason after she left I went and checked my wallet. I'm positive there's 20 bucks missing. I'm nott sure what to do?
Updates
+1 y
So basically what should I do. I don't think she'd fess up to it. I'm thinking of walking over to her house right now and asking to see her wallet. Cause last night she said she had no money at all. So she shouldn't have any now right?
Updates
+1 y
K guys does this make it seem like she did it or what :

I told her I was missing 20 bucks outta my wallet.

Later in the conversation, she said she didn't even have a 20 dolllar bill in her wallet right now.

Thing is, I never told her it was a 20 dollar bill that was missing.

And it was. how would she know it wasn't 2 fives and a ten, or 4 fives? Probably because she took it?

I think my friend stole money from me?
Post Opinion