You could have worded your post much better than you did.
> This type of fatigue is usually caused by selfishness and excessive thinking about yourself.
"There's evidence to show that patterns of negative thinking, about yourself or about the situation you're in, can cause depression".
> Stop sulking.
I can't rewrite this and keep any kind of meaning. Maybe "Use Cognitive Behaviour Therapy to learn to stop negative thoughts, and create positive thoughts".
You could have worded your post much better than you did.
> This type of fatigue is usually caused by selfishness and excessive thinking about yourself.
"There's evidence to show that patterns of negative thinking, about yourself or about the situation you're in, can cause depression".
> Stop sulking.
I can't rewrite this and keep any kind of meaning. Maybe "Use Cognitive Behaviour Therapy to learn to stop negative thoughts, and create positive thoughts".
> I know it's hard to swallow
Yes, it was pretty offensive and not helpful.