I have always had trouble making friends, because I am more selective of who I want to be friends with and and I am sometimes introverted. I am more introverted and guarded in public situations with people whom I don't know and I am less introverted and feel more comfortable being open and talkative around family I know and trust. I believe there are advantages and disadvantages to being introverted or extroverted. Right now, I feel stuck with the problem of the disadvantage of being an introvert. It is sad and depressing wondering if I will be alone the rest of my life, without finding a good match of the opposite sex for me, which is what I don't want. I sometimes want the advantages of being more extroverted, but I think if I tried it, it would be very awkward and fake, like I'm trying to put-on an act, and be an actor, because that is not my true, natural self.
Advantage: More guarded in public situations to protect feelings/emotions and it prevents making friends with whom you do not want to associate with in the future, because if these undesirable types tried to tag-along to become your friend, then you would have a hard time getting rid of them.
Disadvantage: Greatly limits the amount of friends you will have. You could have few, if no friends. The introvert is stuck with the problem of not opening-up to a potential match, because the match in the introvert's mind, has not been "screened" first to find out what their intentions are, so the introvert is not stuck with an attractive, seductive scammer, such as a catwoman, for example.
Advantage: These people tend to broadcast themselves like a salesman or a politician. They are not shy about starting many introductions with different people in a public situation. The many new different friends you will make is unlimited. Your hand-held electronic device can help organize and keep track of the status of these friends.
Disadvantage: These relationships can usually be shallow, because there isn't enough time to devote to a deeper friendship with all of these friends. Maybe some will be your best friends and others, casual aquaintances. The extrovert must master a good plan for politely and completely breaking-up any undesirable friendships, or else this popular extrovert could have a tag-along/old friend problem.