Is it normal that whenever i see a cute girl i wanna be them

What do you mean you want to be her? Are you a guy or a girl?
If you're a girl, you probably envy them, want to be like them because you want their life, their popularity.

If you're a guy, you're probably transsexual. Either that, or you're just some emasculated loser who thinks he would be better off as a woman.

Whether it's normal totally depends on whether you're a male or female. Male - no. Female - yes.

Yes, welcome to womanhood

I'm not sure if I understand why so my vote will be null and void

I tend to want to be the guys I like.