If being with that someone constantly bring tears, pain, sorrows and sadness to you will you still stay with him/her?
I dont have the answer to that nor can I make decision or a choice because it is that someone that made me see the reality of the world.
Without that someone I wouldn’t have changed,
I wouldn’t have seen things differently
Just because someone has tought you something doesnt mean you should be bound with them. Take your new reality and let them be a reminder for when you might loose it, but just move on all that matters in life is being happy.