The hardest thing about this breakup (although the magnitude of good things is far greater) is the temptation to despair, or to be angry. To despair over trust lost, to be angry over broken promises.
Anyway, the summation of all the Holy things I could possibly think or do is this:
“Let us hold fast the confession of our hope without wavering, for He who promised is faithful…” Hebrews 10: 23
Oh Lord that I would hold fast without wavering. You are My Perfect Promise Keeper.