Hi, Fenris! I really sympathise with you. I was a bit in a similar situation and also felt tied up because I was studying at Uni while living at home. I also thought of suicide and at one point it all got too much and I wanted to quit my degree and get whatever job in order to get away but in the end thought that my chances would improve if I finished so I stuck with it. The way I did it was focusing on finishing and kept telling myself that that would pass, that it was temporary. I also kept thinking that if I did not have the privacy/independence I wanted at home, I had this private place in my head where nobody was allowed in unless I let them. I do not want to suggest that there is only suffering to be expected during these 3 years, there is also some fun to be had 
A book that helped me a lot was Viktor Frankle's "Man in Search for Meaning". He was in a concentration camp and described that even in those circumstances people found a way of coping.
Now, some years later (and with a place of my own and in different countries) the relationship with my parents is healing (although I still find it challenging) and my mother has began to change because she realises that life is not fulfilling if lived by her old beliefs. She is more tolerant and open-minded and understands things that she did not before.
This shall pass and you will evolve because you will have learned from it.
Take care
Elena
A book that helped me a lot was Viktor Frankle's "Man in Search for Meaning". He was in a concentration camp and described that even in those circumstances people found a way of coping. Now, some years later (and with a place of my own and in different countries) the relationship with my parents is healing (although I still find it challenging) and my mother has began to change because she realises that life is not fulfilling if lived by her old beliefs. She is more tolerant and open-minded and understands things that she did not before.
This shall pass and you will evolve because you will have learned from it.
Take care
Elena