From the time that we hit the sandbox up until the time we hit the alter, we're told repeatedly to be true to who we are as individuals. Being yourself is a constant struggle for many. I've watched people make attempts to be faithful to everyone but themselves. Meaning, they betray who they are in order to manipulate different situations within their lives.
Neglecting who you are, whether it's to gain favor or acceptance, is in fact manipulation. Unfortunately, this act usually ends up hurting you because you can only appear to be something that you're not for so long.
If someone isn't willing to accept you for who you are, then perhaps those individuals aren't meant to be a part of your life. Don't neglect the most important person, yourself, by putting on a facade to vibe with others. Be your own vibe and the people that are supposed to be in your life will surface.