Any set of rules/guidelines should be as succinct and unambiguous as possible which nessesitates them being broadly worded. It also means that there are clarifications for specific points (in case you didn't catch the obvious intent) I have included a few. Finally, like Asimov's Laws of Robotics, these rules are in an order for a good reason...
Rule #1: Be comfortable with yourself!
If you can't be comfortable with yourself then other probably can't be either.
Being comfortable includes being comfortable around people you don't know or by yourself. Don't always rely on the opinions of others. In the end, it is your opinion of yourself that matters.
Don't mistake Arrogance for Confidence. The Arrogant need other people to be wrong so that they can be right which builds in weakness. The Confident recognize that there are many viewpoints that can be right and refines their viewpoints by allowing them to be challenged.
Rule #2: Meet new people.
There are many people in the world who can be "right" for you. The more people you interact with the more likely you are to meet one of them.
Just because someone appears to be "right" doesn't mean that they are not already taken or will ever be emotionally available to you. Take heart, enjoy your time with them and LEARN what a "right" person looks like and looks for. The worst that can happen is you get a cool new friend and maybe learn something about yourself.
Sometimes meeting new people means expanding upon the relationships you already have. "Friend of a friend" is more likely to have common interests and come to you "pre vetted" by the people you already trust.
Make time for the people who make you feel good about yourself. Who knows, one of the cool friends you have may have been waiting for you to become "emotionally available" and you may not have noticed it. Either way, it helps with Rule #1.
Rule #3: Avoid worthless relationships!
Admit it, everyone has gotten into or stayed in a relationship that is just not fullfilling and never will be. Sex, routine, emotional security, what ever the reason in the end all you are doing is keeping yourself from growing as a person. Either work to improve the relationship you are in or get out! Grow or leave. Harsh, but this is the biggest trap most people fall in to: staying in a dead end relationship because they lack the confidence to either make it work or end it.
If you are not yet in a relationship, remember rule #1, enjoy being with yourself. You don't need to get hooked up just to validate your self image. Flirt, have fun, be daring, but don't date some one unless you see in them the qualities that make you say "wow, I'd be really happy to tell my friends I am dating this person"
There you have them. Feel free to take what you like and ignore the rest. Just a few bits of philosophy from my experience. I hope they work for you as well as they do for me (if not better!)