Hate to say welcome to the club, but... Best thing you can do is go on, heal, and never expect an honest answer from a proven dishonest person. Don't diminish yourself because of them. Don't expect honest closure from someone who doesn't carry any mental burden of such things. Leave them where they lie, figuratively and literally. This is cliche, but all too true: Time does heal wounds. Just don't let yourself dwell on what you thought was or wanted, for it's a bottomless pit of self torture. Learn from this experience what you can, but DO NOT look at everyone else as treating you as this person did. If you do, you keep yourself prisoner of your own making.