I don't think unfriending your old crush on Facebook will do much other than remove him from your Facebook feed. Don't beat yourself up over what you dream about; there are a lot worse things that could slip across the transom of your unconscious mind than an old high school crush who was always nice to you.

If your wife briefly corrects someone with "Actually, I'm bisexual" during conversation, it hardly sounds like attempting to remain an object of desire to me. If she went around saying, "Actually, I'm still very interested in men, particularly you, you massive dose of sexual charisma," you might have a case.

You're right to want to minimize your compulsive physical behavior in the workplace before it bothers your co-workers, but I hope very much you can also give yourself credit for the work you're already doing.

Arm yourself with as many options as possible before making your next move.

Letting events end is not rude. Everything ends.

An adult woman should not be so possessive of her own birthday that she begrudges her friends the chance to get married on the same day.

As you feel increasingly comfortable around your friends, I think it's more than fine to share the basic details of your heroin addiction with them. If they seem receptive, you can feel free to talk about it in further detail; if they seem judgmental or uncomfortable, you can move on to other topics.