In displaying the psychology of your characters, minute particulars are essential. God save us from vague generalizations! Be sure not to discuss your hero's state of mind. Make it clear from his actions. Nor is it necessary to portray many main characters. Let two people be the center of gravity in your story: he and she.
Anton ChekhovI often wonder: suppose we could begin life over again, knowing what we were doing? Suppose we could use one life, already ended, as a sort of rough draft for another? I think that every one of us would try, more than anything else, not to repeat himself, at the very least he would rearrange his manner of life, he would make sure of rooms like these, with flowers and light ... I have a wife and two daughters, my wife's health is delicate and so on and so on, and if I had to begin life all over again I would not marry. ... No, no!
Anton ChekhovAnd only now, when he was gray-haired, had he fallen in love properly, thoroughly, for the first time in his life.
Anton ChekhovLove, friendship and respect do not unite people as much as common hatred for something.
Anton Chekhov