Okay, eminem is talking about when he was growing up.
duh...

His mother abused him and used him in more ways than one and so much so that he cannot forgive her because he's tired of having to deal with her sh*t
he loves his brother so much and he is waiting for when he actually discovers what their mom is all about-drugs and alcohol.

And about Hailie, whom he mentions in mostly all of his songs, Marshall/Eminem loves her very much and he doesn't understand how his dad could have left him-especially when he looks at Hailie and sees how much she means to him and he he could never leave her even if he did/does hate Kim.
he is trying to "clean out his closet", or "get things off of his chest"[[c'mon people, have you never heard these expressions??]] and get over the things that his mom did to him that hurt him so much
but he just can't seem to do it because of how badly it hurt him on the inside, which is why Hailie will never meet his mother-because he doesn't want Hailie to get hurt, first of all, and he wants to get back at his mother

Which I could understand if you look at it from his point of view.