Before this last note when he came home in the middle of the night and saw your brother, etc., something wasn't sitting right with me. I thought - odd. And I also thought this man is sneaking around and he is not thinking of YOUR wellbeing. It's one thing to need space, right? And not to do it in a very caring way "Hey, I love you but right now I need to sort some stuff out, I'll be back Monday night." And then follow through.
It's another to be sneaking around.
Then, reading this note, well. I don't know what to say. That's a whole other ballgame. Maybe other people can advise you better, but he is an extremely selfish person. Fear can do crazy things to a person. But how could he right-out lie to you? On the phone, on the Google program, etc.
I'm really sorry. Do you have family nearby who can help you? Someone who can stay with you a while so you can stay grounded, get the rest you need and let you sort through this while not having to worry about other stuff? (Meals, pets, etc.)
I would say, get rest, try to stay grounded, know that however this turns out you WILL be okay in the end. I promise you.
