Im so tired of this guy.

How do you cooperate in programming projects?
I've been trying to work with this guy for a week now,
and every time i do something he's like "ok, i'll read your code later", and then he does his own implementation, or missuses my stuff since he apparently doesn't even read the comments i've written.

He doesn't want to work together, but rather sit at home and do his own thing.

Now we have ended up creating two different versions of everything, and he keeps changing the package names.
Im tired of this.
Should i just ditch him, or am i being a douche?

cooperation in programming
spilit your shit in a way that everyone can do his own shit
make the sketch 'design'(fuck I hate this word) modular enough
for the separately made parts fit together well enough

Srsly noone ever has time to read someone else's code,
most of team projects are work in a this way:
I hope the other guys aren't complete retards