Hi Gencat,
I am sorry you are going through this. It is one more issue on your plate right now.
It is difficult to me to understand your situation because in the place I live, there is real public education. So, university is for free (unless you want to go to a private university. But in many areas, such as Medicine or Law, public universities are more prestigious than the private ones, so public universities are very popular.). Young people like you do not need a lot of economic support from their parents in order to go to college. They need money to buy books and so on, and a place to live and food in their plates. If they want to study a subject that is not taught in the universities near home, they need to rent a house, in this way, things may get more complicated, but in general, I have seen university students being self-sufficient (by getting a job in parallel to their studies). Or, having their parents to pay for their expenses. living with them or in a different place.
Here, if your parents pay your expenses, they have a say in your life. Some parents practice "laissez fare"; others are very much into their children lives. And the golden rule is :"do you want to do whatever you like with your life? Move out, and pay your bills".
I am giving you all this background so you understand where I come from.
In my opinion, economic self-sufficiency is the key to overcome many situations like yours. It is not the only factor determining the situation, but may have the key to solve the situation. To me, as you depend economically on your parents, they feel they have the right to tell you what to do. We can discuss here is they have this right or not. But it is a fact that if you were economically independent, you could rule your life as you like, and your mom would not have even the opportunity to tell you that "you will be unhappy anyway". We can discuss here if it is your parents obligation to pay for your studies and/or how much a parent should intervene in their children lives.
But the bottom line is that if you were self-sufficient, you could make your decisions fully on your own.
Perhaps this is not the best moment for you to get a job and try self-sufficiency, perhaps it is not smart, given the cost of studying in your country, or your current emotional status, I do not know. But if you see this event from a practical point of view, you can ask yourself what is the best to do in your case, and what are the trade offs you may need to do.
Hope you find a good solution to this particular issue.