.....
ナルコど。

edit: dangit, if only なるこ were actually a girl's name!

But it is. I have personally met a couple of 成子's.

日本人のような名前 - な行（女性名）

ええ・・・？これ、そんなに古いの？日付、全然見てな かった。。。orz

Can someone tell me what this means? 君dake のtokubetsuな人にnaritaina

I want to be [become] only your special person [i.e., exclusively yours, not another person's].

きみ = you
だけ = only, so "only you"
の = possession particle
特別な = special
人 = person, so "special person," so "special person belonging only to you"
に = particle that goes with なる
なりたい = "want to" form of なる, "to become," so "I want to become the special person belonging only to you"
な = particle that I can't really translate into English