To be completely honest, I would be assuming the guy was cheating. I wouldn't put up with that. If he says you can call him, doesn't answer, then calls you back saying he'll be home soon & then takes over an hour to make the 5-block trip, especially if he has a car, I'd be pissed. I'd tell him flat out that I don't want them EVER talking again or I'd be gone 'cause that is EXTREMELY inconsiderate & inappropriate especially considering the issue having been valid in the past. I'd say, tell him that he is in deep **** with that. Have a long talk with him, & I strongly suggest putting your foot down on getting her out of the picture. If you don't trust her & you have suspicions of him in regards to her, she is going to continue to be an issue in your relationship until you DO trust her & your suspicions in regards to her are ressolved.