You're shy, quiet, meek, humble...why would you want to change?
God made us, every last one of us, in His own image. When he fashioned you, he made no mistakes. Some people, he gave the gift of conversation; some people he gave them the gift to carve wood into beautiful sculptures; some people he made loud and boisterous; some people he made proud (maybe too proud); some people he gave a dazzling personality that would attract others; some people, he made quiet and humble...folks like you, who do most of their thinking on the inside, with their hearts.
Shy and humble go hand-in-hand. I think everybody in the world feels shy at one time or another...but instead of trying to fight that traight and become something else that you might not be comfortable with--why not embrace it? Accept it as something that the Lord has blessed you with; it's not a curse.
God loves a humble man. You may not be rich with crowds of friends, but I'm sure that the friends that you have are pure and would far surpass the diluted hearts and fair-weather friends that might surround a "popular" person. Your friends, I suspect, are of quality...and not quantity.
You can be rich in so many things in this world, In2Him...money, friends, respect, popularity, physical beauty, and so on. Some of those riches, you're going to be allowed to take into the next life. But some of them, you're going to have to leave behind.
There's absolutely nothing wrong with you. How I wish I could be more like you, in fact! Sometimes I find myself being too proud, too loud in my conversations, too ready to share my opinions with other people and try to make them see things exactly the way that I'm seeing them. God has blessed me with the ability to share my thoughts in writing, and I'm trying very hard to use that blessing for His glory. To me, this is something that I sometimes take for granted. It's "normal" for me.
With you, what seems like a bad thing can actually be a blessing. You're shy, humble, meek. Embrace that part of you, because not everybody in this world is able to feel what you feel.
Matthew 5:5
God bless

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Shy: wary and distrustful; disposed to avoid people or things. Easily startled or frightened. Lacking self-confidence. (as defined by the Sage dictionary)
Meek: Humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness. Very docile. (sage)
Humble: Marked by meekness or or modesty; not arrogant or prideful. (sage)
Pride: Unreasonable and inordinate self-esteem; a feeling of self-respect and personal worth; satisfaction in your own achievements. (sage)
II Chronicles 7:14
Job 22:29
Psalms 9:12
Psalms 10:12
Psalms 10:17
Psalms 34:2
Psalms 69:32
Matthew 18:4
I Peter 5:5
I Peter 5:6
Psalms 22:26
I Peter 3:4