<human>: I have been dating a wonderful girl for about 3 years, we decided to move in with each other last year and things have been great so far.  I work incredibly early in the morning, while she tends to stay up late and work in her office or watch TV, and over the past few months I've noticed small amounts of money $5-20 missing from my wallet when I wake up in the morning to go to work. 

 I tend to go to the ATM later at night to avoid stopping by on my long morning commute, and sometimes I'll notice there's $10 or $20 missing.  It's been so odd because I'm staring at the ATM receipt that says $100, I counted the money at the ATM (and even when I got home) but when I woke up the next morning there is only $80.  

My SO seems very concerned when I mention it and she has strong morals and has never given off a vibe that she would ever steal from anyone.  It worries me though when there is no other explanation besides her taking it.  I keep retracing my steps from the previous night and it never yields anything.  Just going to the ATM and driving straight home, putting my wallet on the table and then waking up to find less money the next morning. 

 It brings me so much pain to even think about it being her because I love her and see a long future for us, but I can't get it off my mind.  She makes a great living ( earns more than I do) and would have no reason to take money from anyone

What should I do?  I'm starting to be a little paranoid about where I leave my wallet in my own home

Can you provide a brief overview of the text?
<bot>: Money has gone missing from my wallet a few times these past few months, my GF who lives with me is the only one around when it happens.  What should I do?