Break up

My SO and I recently broke up over a petty dispute. He said something I though was disrespectful and I let him know how I felt . He immediately got upset and we didn’t talk the rest of the night . The next day he acted like my feelings still weren’t valid basically to get over it . After much back and forth he said sorry for yesterday but I feel like being alone this weekend . Before it got too bad I tried to call him and message him and he ignored me . Then when he felt like being bothered he called back . We were supposed to go away and he said I messed it up and I nag too much , he says that I’m difficult because he doesn’t like to communicate . He also said that my spot in the relationship wasn’t safe and that he won’t be faithful anymore. Any dispute in anyway it gets blown up to this point . When things are good it’s great but when things are bad it gets to this point . What should I do ? How would you take this ? We’ve been together for a year .