What the hell do you do with yourself after a break-up?

So without getting into copious detail, my girlfriend of 3 years who I love dearly, and I seem to have come to a mutual understanding that we are both in need of some independence and some clarity. We are both confused about our lives right now, and don’t have the energy to invest in a relationship right now. We are on a break, as they say, and it’s been two weeks so far. What’s kinda sad is that our 3 year anniversary is coming up Saturday. I have fun when Im doing something active, or when Im with my friends, but on a day like today I have no idea what to do with myself. I feel like I’m waiting to either cry or ask if this is actually it. I don’t want to interrupt the break we are on to talk seriously, because I’m not sure what will come out of us. I’m not ready to literally say “Goodbye”; the 3 times I’ve IMed her on Facebook have been friendly, but not the same as real life, hanging out saying whatever we wanted; I’m relatively certain we aren’t right for each other, but I miss her company and am experiencing lonliness because part of me is still waiting for the routine I’m used to of spending time together. I also have this feeling hanging over my head that I am waiting for something official to happen before I can make peace that I really should focus on other things. There’s still that recurring false hope of waiting it out. Have you ever been through that?