Now this could be any context; whether it's towards your lover, your wife/husband, BF/GF or just a good friend (or not so good anymore), family member....
Anyway, you get the just. Here's a thread to share what you'd like to say to them yet just can't quite bring it face to face. Practice here or just get it out.
Remember, this is not directed to anyone here, (mind you , it could be; up to you)