When I was really stressed over something, running negatives thoughts over and over in my head (I don't know you are doing this, I'm guessing) a Doctor and friend said to me "what are you going to do about it?".

Apparently deciding what you are going to do about a problem is the best way to free yourself from endless negative thoughts going round and round in your head. I was expecting him to give me a pill to fix it, he said that's not the cure.

Decided what to do worked for me.

In your case I'd imagine you might decide to do something like forget about your relatives completely and start a new life just how you want it. Or it might be try to make amends, it's your decision.