Tell him to take up responsibility for himself

 

特别敏感。That's because he leaves out too much of himself to be taken care of by others. His objective-self feels exposed and vulnerable because his subjective-self is too small to provide the cover.

觉得everybody hates him. That's because others feel burdened by his neediness to be covered.  People feel the drain because he is not carrying his own weight.

His sense of the "self" needs a boost, somehow, so that others can feel the benefit by associating with him (he has to exist first before others can befriend him.)

He needs to love himself more. He is worth that love, which entails responsibility.

Ask for his opinion often.