Should I stop pumping?

Sabrina • Mama to 3 little men
Should I stop pumping? When I started back at work, I quickly ran out of my freezer stash, so what I was pumping each day was being used the very next day. Fast forward to December and my son stopped taking a bottle. Since, I've continued to pump each day, half of my pull out freezer is full of pumped milk, I don't have anymore room. Should I stop pumping at work? He only consumes about 2 oz daily mixed with rice cereal. I just don't know whether all this milk will be used and would hate for it to go to waste but I also don't want to suffer through. Thanks. 
 engorgment if I stop. Thanks.