In the past I would have said nothing but act pissed about it.

My problem is I don't know how to approach him with this.

I could say something along the lines...

Hey, what happen to my slippers?

I don't know.

H: 49
W: 47
D: 6
M: 6 1/2 yrs
H: Bomb #1 6-2010
H: Bomb #2 7-2011
H: Separated: 7-11-11
Reconciling 2-2012
Separated: 1-31-15 (I asked him to move out)