What dont you understand?

If you don't really know what the hell i'm doing,
you could be walking, down the street,
and if a guy know this is me, then he'll be upset.
But if i'm walkin with you, holdin hands on? anybody can see what that means,
shouldn't wear a sign that says don't look at me.

baby im all yours,
kissin and holdin all in public,
why do you think that's all for ?
I don't give a damn bout nobody but you,
but you always question, thinkin i'm creepin without a reason,
why are you always
lemme ask you a question .

Tell me oh
what don't you understand,
doing all i can, you do know that im your
What oh, don't you understand,
if i wanted someone else , then i would be with someone else but that else the one is you .

and it's getting annoying
and i can't prove with what i think ,
that you been checking me, for me, all on my cellphone.
but if you dont then just leave what with me youre calling,
what i gotta do to make you see, tell me something girl cause this is killing me.