Finding Your Way Off Stage

I may have to murder my acting partner. It's at the point of the show now that it's kind of just ridiculous if you don't A. know your lines B. know when to exit the stage/come back on 3. know what scene comes next. D. listen to or do anything the director originally told you to do.
I am so beyond frustrated. It's anger inducing, and I don't even get angry!!! And when he says, "chill out, you're being a perfectionist" I want to strangle him because I'm not trying to get it perfect, I'm trying perform the play that we were given- I'm just trying to get through the damn thing so kids understand your ramblings. It's not improv. If it were, that'd be fine. But it's not. And it's not a matter of being perfect, it's a matter of performing a play that looks remotely like the one given. It's knowing what's going on in the scene so that IF you DO mess up a line or forget one you can give one that sounds remotely like the one you were supposed to say. OR being conscience enough to know what happens next so you can make it up. Not repeating yourself. Not going back and adding the line later because you're so sure that you need to get your all important line of "what does this mean?" out which has no real necessity to the plot once I've already saved your ass!
I have no trust or faith in my partner. And seeing as how there is only two people in the show- that really sucks. And I really hate not being able to trust my partner. What if I forget a line?!?! Dear lord, the whole show goes to shit. So there is really no room for error.

However, now that I've bitched, I must focus on the good. I MUST!
This should be my new mantra:

The important thing is that the kids still like it. The important thing is that the kids still like it. The important thing is that the kids still like it. The important thing is that the kids still like it. The important thing is that the kids still like it.
OR
This experience is improving your skills as an actress. You will only get better because of it. This experience is improving your skills as an actress. You will only get better because of it. This experience is improving your skills as an actress. You will only get better because of it. This experience is improving your skills as an actress. You will only get better because of it.

It's going to be a long summer.