Apartment management and landlords are legally obligated to provide I believe at least 68F (I think in some states it fluctuates but it’s never below 65) in the unit. Doesn’t matter if you have drafty windows or doors. This is the law and regulation in the US. 57 is simply against the law and is a legal matter. They must provide that. If they cannot ensure your furnace provides that, they must provide electric heaters until they fix whatever they need to fix. Not soon to be ex. Your landlord must provide. Again it’s against the law. Take pictures of a thermostat. Time stamp it. Tell your landlord that you’ll be talking to your lawyer and your doctor. Living in 57F will cause respiratory issues. It’s a major health concern.

The only way you can ensure you can move on, is to stop being in touch with your soon to be ex. As long as you are staying in touch, he’ll be right back in in few months and then you’ll be right back to lawyers a year or a few from now.

It’s like if you want to stop smoking, you won’t be buying cigarettes and looking at them. You won’t be buying snd having them around. Same here.

You don’t want to be back with your husband stop hanging out and talking and being involved with him. You don’t break addictions by surrounding yourself with substances (people or items) who are causing you problems. I know it’s hard to break addiction to an abuser but it’s twice as hard if you are having him around (talking and seeing). You make it harder by allowing him to be a constant presence in your life.