Do I have to write every day?
I don't think you have to write every day to be a poet, but probably if you really are serious about wanting to write poetry, there probably needs to be a time every day where you put yourself in a poetic frame of mind. By that, I mean that you start wondering or thinking about something that might one day be a poem. So, whether that involves actually writing or whether it involves staring out the window of a bus and thinking "why don't I think about shoes," and start playing with it. So I would say every day do something to do with poetry, yes.