I think I ruined my family
Why would you say that you ruined your family?
I always have to study and I can't be around them.
It is bad to ruin your family by not spending time with them. You should just spend your break time catching up, like when you eat.
I am too busy with my studies and I am not going to stop.
Even if you are busy studying, I'm sure you could find the time to at least call your family briefly to talk to them and catch up.