Sounds like your dad's new wife is a great person. Have you considered asking your dad and step-mom if you could temporarily live with them for a while? Have you asked your dad already about this? Does his know what's going on with you at your mom's place?

Sorry you have had to deal with so much instability with your mom and her 2nd husband. Sounds like he's very controlling and manipulative, and created a wall between you and your mother, which, shame on him for doing.

I think if you could live with your dad for a few months, that stability would help you feel more secure and help you stay focused on enrolling in a good high school while you occasionally visit your mom to keep your insurance active.

No teenager should have to go through what you've gone through. You sound very intelligent and very emotionally mature. You are not a sociopath. Please don't listen to your step-dad. He sounds like he has some control issues himself.