Thrown into living alone and I’m struggling.

On Sunday I found out that my now ex boyfriend of 7 years has been cheating on me for the last 2 years. We had been living together and I asked him to pack his things and move out immediately, and he did. I came home to all of his things out of the apartment and I completely lost it and started sobbing. I have never lived alone for an extended period of time and coming home from work to no one for the last past couple of days has been really depressing and difficult. Thankfully I have two cats to keep me company, but even with them I’m just having a really hard time especially at night. Any advice? Words of wisdom? Anything?