Now you are just somebody that I used to know

Now and then I think of when we were together, like when you said you felt so happy you could die.. Told myself that you were right for me but felt so lonely in your company. But that was love and it's an ache I still remember.
But you didn't have to cut me off, make out like it never happened and that we were nothing and I don't even need your love but you treat me like a stranger and that feels so rough...