You don't have to have everybody over to your house for pizza and beer. Love yourself absolutely. Avoid anyone who tells you she has dozens of best friends. She doesn't know the meaning of the words. Enjoy your dozens of acquaintances, pals and buddies, but recognize the difference between these relationships and those you enjoy with your close friends.
Close friendship takes as much work as any marriage, and is as rewarding.
Do not tolerate bigotry, or racism, or misogyny, even when it's masked as humor. Fight for the right. Work hard, but don't fall into the workaholism that plagues this society. Never ignore a noble impulse. It's a Wonderful Life each Christmas Eve.