This situation is not to be underestimated. It may seriously affect health, spirituality and the person.
I have seen multiple times people under the direct influence of their parents, being unable to rebel or think with their own mind, for the whole of their life, doomed.
This happens because often family ties are strongly imposed on children, to the point this is deeply embedded in the mind of children, resulting in programming, emotional manipulation and control, life-long enslavement.
It is also clear, if his family is in position of getting money from you and depriving him of money - thus freedom - that this is a very abusive and manipulative family. Don't forget, the law may punish those behaviors, depending where you live. Depriving a person of his salary, if he is working, is a crime. So this may be a family of criminals. How often do we see that manipulation, blackmailing, forced obedience are part of criminal families like mafia and the such? It is now how things should work. This is more than toxic, this is deadly.
I broke free from an abusive family. My brother is unable to understand this, he is both a victim and an oppressor. Because, this kind of families enslave the mind, transforming family members in their puppets, and this has been his destiny. So I broke free of my brother too, as he was constantly bashing, blackmailing and threatening me on behalf of the "family boss".
If you want to break free you need to magickally hit the "boss" who is controlling everything (normally the father or grandfather, as those are very medieval families with male-centric mentality). Of course women have usually no rights in those "families" and are treated like slaves, dogs or worst.
Consider breaking free from your boyfriend, if he is unable to see what happens, because an enslaved person will drag you into this system quicker than you can realize it. If you boyfriend has a grain of salt in his mind he fill follow you soon after. Otherwise, if he is nothing more than a clone of his family, he will quickly look for another victim like you to be financially enslaved an drag her into the "circle", quickly forgetting you.
Ask your Guardian Demon where to hit magically and if you have any chance to redeem your boyfriend.
Consider that, it is most likely your planets bringing you to a negative relationship like this, so probably the negative aspects will keep going like they are going now.
If I were you, I'd run far away from there.
Best of luck
Also. Don't feel alone in this situation - should you ever want to talk or vent out, post here, we'll listen to you.
If you receive violence (also emotional violence and blackmailing) consider calling police or so, if situation worsens. People like this won't like you trying to break free and also trying to heal your boiyfriend, and may react in violent ways.