It is a phrase Justin Bieber uses in his song, "
Love Yourself" that actually means
fuck yourself, and is closely related to fuck off. However it has a double meaning since while she fucks off, she should love herself if she
thinks that she is so important to think that he will still think about her and wants her back.
She doesn't love herself enough to be so desperate for him to want her back I guess.
If you think that
I want you back then you should
go and love yourself.
If you think that I am still thinking about you then you should go and love yourself.
If you want to
borrow money from me, then you should go and love yourself.