John,

You being bad at confrontation (which I can fully relate to) is understandable.  I would suggest you switch roles and ask how you would feel if you got the email?  Would you have found it more respectful getting the news via face-to-face?  Here’s a suggestion: Write out what you want to say and read it to her in person.  I also suggest being explicit, i.e. “you need to move out by X date” rather than leaving it vague.  Keep this concise and don’t make it into a long speech.

Good luck,

Mark