Of course there are exceptions. In that case, of course you will feel HAPPY because you were finally able to see an old time friend. During that brief moment you will feel glad that you saw that person and you will say: Hey, I´ great! How about you, friend?![]()
Yes, but though it's not a long time gone friend but a neighbor, or a classmate... all they want is to greet you as they would say good morning or good afternoon to anybody. So there's no need to wear frown and pour all your sentiments to them. Unless your main purpose is to confide your feelings to the person that you go to his house, perhaps, just to meet him and share all your burdens with him. That would be quite acceptable, I guess.