"You'll have more people interested in you by getting interested in other people in two months, than in two years trying to get people interested in you." ~ rough approximation of a quote by author unknown
Truer words were never spoken. I think a lot of people mistake being interesting as always having something to say. Whether we like it or not, it's a general rule that people generally enjoy talking about themselves more than anything else. One of those lovely quirks of being a human being!
While I agree with a great deal of the advice here about getting involved in the world, be it through clubs, reading the newspaper, and getting active and developing opinions, that's not all there is to it. Boring people, to me, are those who seemingly have no life or purpose. They are also the same folks who seem to know nothing about life, the world, or other people--they only know about themselves. And well, that only keeps other people interested for so long...no matter who you are!
Trust me, I used to be friends with someone who not only talked about himself all the time (and only seemed to care about himself, his own opinions, and his own problems), but didn't have that interesting a life to boot because he never *did* anything (other than work, sleep, and be online) and he never solved *any* the problems in his own life--he just whined about them all the time. *That* was a REAL drag, and it doesn't sound like you have the self-absorbed problem which is a REAL barrier to making (and keeping) friends!
So I guess my advice is different . . . by all means, take steps to get more involved in life, in discovering your passions, and in meeting new people. But once you've done that (and that, really, should be for yourself--not proving to ANYONE how *interesting* you are!), I find the real trick to having friends, offline and online, is to be a good one yourself. Get interested in other people. Ask questions. Be a good listener. SMILE!

You'd be amazed how far this goes with people and makes them AND keeps them FAR more interested in you than any 'act' a person can put on for their benefit. As I said before, whether we like it or not, people like to talk about themselves. By no means, am I suggesting you share nothing about yourself nor decline the spotlight, all I'm saying is that you are *far* more interesting and worth investing time in for other people if you show yourself to be someone who has interests and fun, but also takes pleasure in learning about what other people's passions are and what makes them tick.
If you feel you are a quiet person, there's no reason to become loud and zany in order to simply be 'interesting', but also no reason to be afraid of people. "Nothing ventured, nothing gained." A simple hello is not too hard and when in doubt, ask questions--you'd be surprised how quickly someone will open up if they feel your questions are genuine and you are willing to listen. Someone who doesn't allow you to be who you are isn't really someone worth having as a friend. Play to your strengths...becoming more well-rounded should be something you want to do for yourself, not to please anyone else or make any sort of point. My Mama always said

that you have two ears and one mouth for a reason, and as long as you're talking, you're learning nothing new about anything or anyone, so when in doubt, engage people by asking questions, listening, and smiling...if they're any kind of person to talk to, they'll return the favor.
All my humble opinion, of course, but I wish you all the best of luck.

You are certainly on the right track with getting out there, finding things that interest you, and finding people who share similar interests, which always helps. Best of all, you've gotten some great advice here from all these other posters.

Have fun making new friends!
