Hey there,
I'm sorry that you're going through this!
If you think that being in your current environment is toxic to your own wellbeing, seeing as you're 21, I think it would be reasonable for you to move out if you can. If you can't just yet, then try to keep focusing on the positive parts of your life: school, your boyfriend and his family, and your future. Don't let your family control your emotions. Control your own emotions and you will be able to control your own life!
Feel free to
PM me if you ever need anything!
Kyra