Amber was big into making Michael guess, playing games, keeping him on his toes, and she's accepted some responsibility there in not letting him know how she feels. She did tell him he wasn't her type. The thing is I think they both like each other quite a lot.
I'm not really a fan of Curtis either, but I do feel sorry for him because dealing with Amy's behaviour must be very difficult. I don't think many of us has ever witnessed someone deciding they want to marry you and have kids with you, before even agreeing it's an exclusive girlfriend boyfriend relationship like this.
Then to be crying for days on end to the extent you need to be removed and need counselling must be so hard to deal with.
I also feel sorry for Amy, she's clearly not mentally well at all, but I don't think anyone is at fault, I reallydont think anyone could have predicted this.