This is some advice from a born again alpha male:

Before other people can like you, you have to like yourself. Learn to enjoy being alone and really get to know yourself. To really love yourself you need to accept the fact that your life is finite and you should enjoy it while you're here. It sounds corny, but if you really sit and think on that idea your whole mindset will change. You'll realize that you have the ability to make each day beautiful and anyone who has a problem with your beautiful day can go suck it.

After accepting this approaching anyone become effortless. Strike up a conversation with the person next to you because you feel like it, because you think it will make your day more beautiful. People who think like this ooze confidence that others pick up on very quickly.