I went through this a few years back.  I was expecting it to be harder than it was.  How much time do you spend in it?  Or have you lived on your own for a while?  I had lived on my own for a while so the house wasn't my home when it was sold and that made it easier.  As mdk said, your memories don't live there any more.  If you want or can, take pictures of parts of it that you want to hold onto.  I know it was easier for me because when I went to visit the house just before it was sold the tree I used to climb in daily had been chopped down (years earlier and no one had told me) and the row of lilacs I used to read under was also gone.  It was enough to help sever things for me.  That house wasn't the house I remembered, not really.  

I hope things go well for you in this regard.  But things are just things, keep that in mind.