Husbands odd behavior

My husband was cleaning my old car out so he could drive it as his work vehicle since I just got a new one. As like any other person I’m sure I just don’t pay much attention to physical mail since all of our bills are done online. Well, he stormed inside going off cussing and saying I needed to not “hide” mail and late notices (what?) he said that it said I hadn’t paid our water bill in March (well, I did- one day past the due date online) he doesn’t understand how computers auto process these and send out I guess. But literally to tell me I am a liar and hiding mail, what the actual hell?! THEN he proceeds to grab his keys, tell me he’s “done with me” and wants a divorce. Ummmm. Okay. I think there’s bigger things going on in the world than to threaten divorce over a stack of mail. Am I the only one with a jackass husband? Probably?? I think he’s cheating on me honestly. He is going for massages again often and when he goes upstairs to nap he gets mad that I don’t come lay with him. I hate naps. So then I get accused of talking to men on my phone while he’s asleep just because my phone was on 2%. I’ve never in my life ever thought of cheating. Make it make sense!