Why can't you be yourself?

Two-facedness is really one of my worst pet peeves. People who change their behavior around different people.
Sure, it's a normal part of our social skills to adjust our behavior in the presence of different groups - we usually use a different type of language around our peers than we do our elders, modify our behavior around strangers, don't let the "mouth faucet" run as much around a new acquaintance.That is perfectly normal, and I would say lacking those abilities would indicate you have what I call bad social antennas. But entirely changing behavior around different people? That screams insecurity and instability to me. The person doing it is obviously not secure of him/herself, but also you cannot trust them. It also becomes a tiring task to adjust your behavior accordingly, because afterall, if they behave one way with you, and one way when you're in a group, you have to adjust the way you talk to them!

I have one girlfriend I know very well. She is quite mellow around me, but as soon as we meet other people, she puts on this whole "COOL FRONT", desperately trying to suck in all the air around and make sure all attention is on her. I don't mind cuz I don't like all attention on me, but its so forced and uncomfortable. She has to talk extra loud, use rougher words, laugh extra hard..she basically puts on a face that ain't hers, making these people think she is someone very different from who she truly is. Whats the deal? Most annoyingly, I have to change the way I talk to her because the girl I know isn't there anymore. If I were to continue talking to her the way I usually do, she'd feel struck by insecurity and rather try to make me a fool and say "You don't know what you're talking about hahahaha" than actually be herself.

And how about guys/boyfriends who does this? They are calm and thoughtful around you, and as soon as their 'crew' shows up, they're all tough, loudmouthed and idiotic again? Just to impress their boys and make sure they don't say "ahhhh your girl's got you on a leash". Grow up mehn. Don't even get me started on all the boys/girls men/women who engage in that kind of group activity to discourage their friends. That's another talk for another day.

As for me, I am at work and I have moved closer to making a choice on what I wrote about in my last post, so that is at least one relief! Thank you for all your concern I appreciate it so much xxx