What an asshole! Even before you got to him not coming home I was pissed off at this guy for leaving the alarm on. Utter disrespect. Doesn’t matter if you where his love of the century or not. You don’t do that that even to people you don’t know.
I admit I am not great at calling home. But my wife is used to me not being great at that. But I would never be away a whole night without calling. If I get unusually late I will always call or send a message.