Victim of conformity?

I have known people that change themselves to be liked by others. Why do they do it?  
Why do people have to bend over backwards just to be accepted by "everyone else"?

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Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him.
(1 John 2:15)
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2 Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.
(Romans 12:2)
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