It is not your fault, to have loved them. Why must you feel sorry to give love?
It is not your fault, to have believed in them that they will stay. It was their choice, to leave someone who loved them so dearly.
It is not your fault, to have given them the chance. You gave yourself a chance, to love and to be loved. And if you did not receive love in return, it wasn’t your fault too, it’s their inability to give back the love that you deserved.