Chords for How to play "Just a Friend" by Biz Markie on piano (simple)

Alright, this is Just a Friend by Biz Markie.
First off, it's really simple, just did this by ear recently.
[Bb] _ It's a [C] C chord with the G up here, so it's just these three. _ _ _
_ _ _ _ And then [Gb] it's a walk down, so it [Dm] goes_
[C] _ _ _
Then it moves to [Bbm] a different chord, which involves the F, [Dm] the A, and the D.
_ _ So [C] together that'd be _ _ [F] _ [Dm] _ _
that.
That's what we have so [N] far.
Now from this, it kind of gets a little tricky.
You [F] keep these [E] two the same [F] throughout this kind of [Ab] rendition, I guess.
So you start that off [Am] with_ _ _ _
So then it sounds like_
[Dm] _ _ _ _ _
So you keep playing these two [Bb] while you [Dm] go_ _
_ _ _ Then you do [Am] that again.
[Dm] _ _
_ _ _ _ [Gbm] Now this isn't exactly how it is.
I don't know exactly how it is, but this is kind of how I [C] figured it. _ _ _
Just play these two together, and [Gb] then move here, [C] _
and then back to C.
Then you're back to normal.
That's all it is.
So through it should sound like this.
_ _ [Dm] _ _ _
_ _ _ _ _ _ _ _
[C] _ _ _ _ _ [Dm] _ _ _
_ _ _ _ _ _ _ _
[Cm] _ And it [N] repeats throughout the song!
[Eb] And that is Just a Friend by Biz Markie.