For long term read 2 books by Jim harmonn and Dale carnegie (how to make friends, how to win friends and influence ppl resp). Single is fine and healthy most of the time and that is actually one of the character of successful and intelligent ppl. But got serious consequences on the other side. Simply, humans are a foolish psychological creatures--lough, compliment, always talk positive about them, never critize them. When they are out of line use a strong sarcasm or sometimes a simple punch if could bear the reaction. Good luck kiddy