What do you think, Is this a good rap? Or does it suck..?

My buddy tom swears his rap is great, but when I gave him constructive critizism he just got mad and said I don't know what I'm talking about... GOOD OR BAD... prove one of us right. Why is it good or why does it suck?

here it is:

hey bryan why are ya cryin

if ya dont stop ill think you're dyin

but i aint buying all of your whinin

you sound like a ***** that just wont stop lyin

around with dudes tryin to be her friend

wait a second i finished an email should i press send?

and i hate to do it friend, this is the end.

but i dont know man i think that's the trend

just kiddin' im here to do yer biddin

my lyrics be fly if i stopped id be sinnin

so ill keep it up cuz im cute like a pup

why don't you step off i aint tryin to be bumped around

cuz you look like a motherfuckin clown

but all you do is frown

go away cuz you're bringin me down

straight into the ground

6 feet under,

**** it makes ya wonder

if all of life's a blunder

its kinda scary like the sound of thunder