I have too much leftover spaghetti and now my belly hurts
Why did you overeat spaghetti?
I hate my body. I will eat myself to death one day
Eating until your stomach hurts is not a healthy thing to do and can lead to weight gain and health issues. If you really feel that eating too much is causing a problem in your life, then you should consult with a doctor so you can get help with the issue.
I can find a way.
I think you should just practice eating half of what you intend to eat, then go from there.