just out of reach
Dearest Dark Kisses, a man who cannot explain to your face why he is leaving, is the same type of man after marriage who will leave you with not just a broken heart, but, unpaid bills, a "for sale" sign on the house, and a child tugging at your skirt crying because "daddy didn't say good-bye." Believe me.....I know.
Obviously he tried to soften the blow so to speak by talking of marriage with you right before he made his leave. Some people are just not good at handling difficult situations, or owning up to their short-comings. Leaving the keys with your mother is another red flag that he could not deal with confrontation.
I would box up his things and take them to wherever you see fit. You say that you are in a new relationship, now go on with your life and quit worrying about the past. Life is far too short. Just keep the lines of communication open with this new man, and above all, listen to your inner voice - it never, ever lies. Good luck to you. Keep smilin'. hugs, Chris