No matter what the situation is, whether it be a relationship, friendship, quitting a job, or any other major or minor life decision, sometimes getting closure just isn't going to happen. You won't be able to say your piece or close that chapter of your life the way you want to.
But we must come to accept that that's OK.
It's fine not to have that closure because life doesn't always work out the way you want it to. Being able to accept this will help you in the future; it will help you grow as you continue to live your life.
Some tips on how to handle not getting closure if you feel like you can't move on without it include writing down your feelings or venting to someone you are close to.
Closure isn't guaranteed, but the ability to move on so you can continue to live life without it stopping you is important!