how to break up
Respect will get you everywhere.
Try taking a break first.
In the weeks after my first real heartbreak, I made an effort to spend time with my ex in a misguided attempt to prove that, despite being brutally dumped, I was still awesome. He couldn't care less; he had already started dating someone else. But being around the source of my rage was eating me alive.
Tell each other how glad you are: that you are breaking up with dignity and consciousness rather than by 'cheating'; that you share the same order of priorities: God, growth, relationships.