dating turned disaster

We started dating two weeks before the pandemic hit the US. As college students, we were supposed to be sent home to different states but ended up both getting permission to stay in the dorms. Since we got moved to the same dorm, we ended up effectively living together a month into our relationship. COVID robbed us of the part of dating where you introduce each other to our friends and slowly mesh our lives together: instead we just became each other's whole world. When college started up after a long-distance summer, we became next-door neighbors. However, getting to see friends again and having some return to normalcy ruined everything because I realized we didn't know how to live without each other anymore. We broke up, but since we're still living next to each other we keep having booty calls and don't know how to get out of this cycle.