I can tell you this: Don't do something just to make yourself feel better.
Further, on what is responsible behaviour: Everything you do or do not, has both positive and negative connotations.
There is no right and no wrong...
So your only consideration is: where is the greatest value?
That is a tough question and really has no quantifiable answer.
I think the best that I can offer is... you may want to reconnect with X1 first, if she is willing. Being respectful of her and anyone else in her life.
