Thank you both for this advice.

Actually, I haven't consciously modelled other people or myself. The feelings of other people usually seem rather clear to me, and for myself, I dealt with these problems on a case-by-case basis until recently. However, I am not content with the success of this case-by-case approach anymore, so I'm interested in changing that.

Concerning modelling people: How would one go about to do that? Are there any sequences on this topic, or could you recommend a book or something?