Not anything I can say or add for now OP but I’m sending you my love.
i was in a terrible controlling, coercive, grooming ,violent, sexual abuse and everything else in between ‘relationship’ in my teens and my twenties. I managed to get away with my DC and build a new life. I’m in my 50s now.
I have CPTSD and other problems from that time in my life so I understand how overwhelmed and confused you will be feeling. But just to let you know it’s definitely abuse and there’s help available. Even if you aren’t sure it is. I’m sure it is.
At some point you will have had enough. And like me just leave, I don’t want it to get to the same level it did for me before you leave though. So tiny steps towards the end goal of leaving.
A safety plan is there ready for when you need to leave. For example, this is me now decades later. Im not under threat now but it’s reassuring helps me cope on the bad days. I have some cash in the house in a safe place, I have a bag of basic clothes which I used to keep in the boot of my car (before that in a shed or garage so just looks like old clothes for gardening or for charity), I have my bank cards with savings accounts that are just mine, I have a phone that I use daily but can put a second SIM card in so if I leave it goes off until the new sim is in and I have my passport in a drawer next to me where I sleep. So all of that are things you can start getting into place, be very very wary of your online activity and what is being checked and the cameras in the house. You are being watched so you will have to do everything very carefully.
and remember you don’t need any of that to actually leave, if you are fearful especially of SA you just walk out of the front door and go to either a doctors, a pharmacy and they will get you help. You will never have to go back again and face anymore abuse. How rural are you are those in walking distance. If not you go outside to a safe area and you call the police. Everyone is here to help you when you are ready.
and finally the school friend talking to your husband is not your friend. Do not trust her.