Never go back! And if what broke you tries reaching out to you again, ignore them. A valuable lesson for everyone to know. If they broke you to begin with then he didn't love to fight and be better for both of you.
Trusting in the Lord will help your everyday life and there will be lots of times when you stop and ask yourself, "Why did God choose me for this to happen?" But that is part of how God works. Hallelujah, Praise the Lord! Needed to hear this!