Monologue Need major help correcting it

Hello, Could someone correct my monologue for me, see if there are any grammar mistakes or stucture problems. I'm having trouble correcting this monologue, I'm writing a script and I need help.

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Interior/ Landing of their aparment- Day

John

Open the door claire. I'm not going to ask you again. I'm mad at you right now.Its not so much the fact that you lied to me as that you're not opening this door and not being straight with me. Instead of living a lie, can't you just come clean. I really don't know what I'm more pissed about; the fact that you think I'm stupid enough not to find out or that you don't have the curtoesy to open this door. For you to do such a thing, you must have one heck of a reason, at least I hope you do.
The more you keep me out here on this landing, the smaller your chance of coming out of this unscathed is, literally I mean. All this time you've been coming home to me, keeping up appearance when really you were fucking another man.
Do I mean that little to you. I swear to god, you're going to lie to my face when I manage to get in, but Claire there is no point in lying or denying when I know you're lying. If all this was a misunderstanding you would have insisted that I listen to you while you call the guy in front of me to prove it was not true. What's you're excuse going to be ; that you saw a friend in him and that you ended up falling in love.
Can't you see what you've done to us. I can't believe it's come to this . Claire one more thing- Do you really think it's a coincidence that I was at that restaurant when you were there with what's his name.

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Thank you so much.