You're never going to find a way to cope/ find the skills to get over this if you just give up.
Frankly you're being overly negative.
Stop saying no and hiding in your room, it's hardly going to make things better is it?
Yes I know it is hard, I have been there myself. But you NEED to work on it. Otherwise this is will always be the way you handle tough situations, which in the end will result in failure.
Doing nothing leads to definite failure, trying improves the chances of success.