All throughout my life I have always felt like a failure to my family.
Why would you think that way?
It is because I didn't graduate from university.
You can't help if they're disappointed. But you should graduate if you want to.
It won't change anything.
But it may change something, if you go back and give it another try and graduate I'm sure your family will be proud. I recommend looking into classes you can take and see if you are able to give it another shot.