Its starts out-part of it:

He is into her
She is onto him
and thats the way its always been
to be with you if you wanna do
unless she finds i got you to
then somehow she
wouldn't wanna be
it turns out suddenly
and i'm like "Yea"
and she's like "No"
I'm like "c'mon baby lets go"
And she is like" I don't think so"
Anbd I'm going....

whats the name and artist please