My husband went out of town to our home town to play a show this past weekend and he was supposed to be staying at his best friend/band mates house Friday and Saturday night. But he ended up sleeping at this very attractive single girls house Saturday night, alone. Yes, I know her and get along with her. But I only know her thru partying. And supposedly they were partying there... there was one other friend of his there. But I guess he left that night because said girl drove him to his band mates house, alone the next morning . I’m super super upset with him. We’ve been together 10 years and I’m handling this much better than a lot of people would. But he’s trying so hard to justify it and make it not a big deal... all he had to do was tell me that night that was happening and he chose to wait which I think is weird. 
Ps... my dads passing from an OD is this month (12 yrs ago) but it still hurts like a son of a bitch, and he knows that. Makes it all so much worse.