The only way that I've ever been able to cope with overwhelming sadness and pain is either hide from it doing something like study or play games or if that isn't possible, force myself to feel anger and hatred instead by listening to aggressive heavy metal or industrial music while forcing myself to think malicious thoughts or daydreaming about how badly I would want to kill everybody who has wronged me in the most agonizing ways possible. Don't worry, I'm not actually going to kill anyone but I do fantasize about torture and murder a lot and it makes me feel better

Anger and hatred are toxic emotions, yes, but they feel a lot better than sadness and hopelessness.