I love the brevity here! The message here is simply but beautifully written and it just lifts me up while reading...the title caught me as I guess I was expecting more of a sad poem, but it's interesting.

First line: just capitalize your "i" in "i'm" unless you did it for a reason or wrote it that way meaning to.

"when the scars on my body are my own."
- Wow, I was just thinking it would be about scars or realizing we all have scars but I love how you made this so personal, so your own.....it makes me think about my life and that I should still see myself as beautiful though these faults are in my past, etc.

"No one to cause me fear,
or intimidation for being along."
- Did you mean alone in the second line here? I guess I don't understand the "along". I think the first line sounds like a sound lyric, it's so calming and peaceful.

"I look at my eyes,
round, brown, and full of life.
My mouth opens wide,
White gleams out.
I think its my smile."

-I like the image here of how you are finally looking at yourself and not shying away, being happy to and being happy to let others see who you are, your emotions coming out, your smile. It's neat how you said "I think..."- that added to the piece, like you're still unsure but you believe.

"My nails are paited blue at the tips,
so when they see my scars they'll know,
I once held the sun."

- "paited" should be "painted"

I adore the last line, it's such a strong statement to end the poem and it just warms the heart. My only suggestion is to connect the blue-painted nails with another line added in before you go into concluding just to have the nail part go with another description, instead of just moving on to the scars part.

Beautiful piece, you say a lot with few words! Keep writing~