He's leaving later today (It's 3:19 AM here now).
As a going-away present, I thought I'd change my homepage. Before we go to bed, I'm gonna set my computer for a 'scan'.
When I'm gonna 'scan' it, I'm gonna put it as about 20-30 difficult-to-close Rick Rolls as my homepage all in different tabs.
I can also help the fact of 'scanning' as my MSN tends to break and I need to 'scan' to fix it.

Call me an a** if you like, but I'm sick of him.

He's leaving later today (It's 3:19 AM here now).
As a going-away present, I thought I'd change my homepage. Before we go to bed, I'm gonna set my computer for a 'scan'.
When I'm gonna 'scan' it, I'm gonna put it as about 20-30 difficult-to-close Rick Rolls as my homepage all in different tabs.
I can also help the fact of 'scanning' as my MSN tends to break and I need to 'scan' to fix it.

Call me an a** if you like, but I'm sick of him.

How in God's name do I tell someone to piss off nicely?

I'm aware of that, but when someone stresses you out for months, it's kind of difficult to not do something to have them not want to be near you.

EDIT: And trust me, using my mind is coming next.

If you can stand reading a paragraph:
Someone in my family has been over for so f#%$& long and I want him to go the f#%$& away. He's gotten to the point where he stressed me past my limits as I am not used to people being nearby me for a long period of time.
Although I have very little power to tell him to piss off, how do I tell him that I'm stressed and I want him to go the hell away nicely?

Tl;dr:
I want someone to go away and I can't tell them to go the f#%$& away nicely.

Any suggestions?