Wife on antidepressants, acting strange!

[SteveLW]

To help with my situation I am going to take sandi2's definitions of a WW and keep the ones that apply to my situation:

*She is not the girl you married. She no longer feels the same and won't act the same.
*No matter what her values and spiritual beliefs have been in the past, and regardless of the high standard of morals she held, they have temporarily vanished. For how, nobody knows.
*She does not want to be fixed. Nobody can fix her, especially you.
*She is in complete rebellion, and will defy you when you make demands, threats or give ultimatums.
*Her heart has turned cold and selfish. All she thinks about is what makes her feel good at the moment.
*You cannot change her mind, influence, convince, or sway her by talk.
*Her brain has lost all capacity to use logic. Therefore, you cannot reason with her.
*She is addicted to the high she gets from the A. She will do most anything to get her "fix" again.
*She cannot be trusted as long as she is wayward, and until she goes through the complete withdrawal stage from OM/A.
*She will cake eat whenever it suits her......if you allow it.
*She wants the best part of the M and the A. She gets the H for security and OM for her emotional needs.
*She will bait her H, and test him.
*She will give him just enough crumbs to keep him hanging on and attached.
*She keeps the M/H as her plan B, in case A/OM doesn't work out.
*She will be interested in H if he detaches, acts as if he is busy, happy, moving on without her, and won't give her the details when she starts asking.
*Pursuit from her H only pushes her further away.
*She is living in a fantasy world. She wants the dream to continue.
*She will blame her H for every thing wrong in her life. His apology does not erase her resentment. She will totally rewrite their marital history. She holds on to her anger toward him b/c it fuels her negative view of the M and justifies her present actions.
* Her common sense is gone and she only operates from her emotions.
*She is willing to risk everything and throw everything away for her addiction when the A is at its thickest.
*She sees her H as the enemy.
*She has to suffer some type of loss (due to her decisions) in order to shake her from her fantasy fog.
* She is on a roller coaster and will not act the same every single day. Her emotions will be up, down, and all over the place....but never on an even keel.

Wow, couldn't delete a single one. There are some that aren't always true, but that relates more to the last point: roller coaster.

One day she behaves as if the marriage is over and she is moving on with Plan A (even though she never actually takes any tangible action towards that IE FANTASY). The next she acts like her future is with me and our daughter, and the life we've created (church, friends, activities).

So I think I will need to truly detach, but I am afraid since I was an absent husband this will backfire. Anyone ever been in my shoes? Where you were detached before all of this, so detaching further seems to be the wrong thing to do?