Confused by WAS

[Grizz]

Recently I have had trouble with "being nice". Wife is pleasant most of the time. Initiates conversations, is friendly,etc. But as time goes on, I am feeling more and more resentful toward her. This really makes it hard to be nice when I am around her. We continue to ML (not nearly as often) but we still do. The issue is that she takes days that she will sleep in another room then show back up in our bed for a few nights. This is when we ML. Part of me wants to stop this. But man that would take some will power! I feel like she is just using me. Do we ML because of love or is she just "wanting it" and I am a willing partner. Who knows? Does it even matter? Some say to continue to have sex if the WAS wants to because that does keep a connection between the two of you. Do I continue to do this for that very reason even if she does not love me anymore. I hate being used and that is what I feel like. Also all along I have felt used because I feel she is just hanging around until she finds a new job. Over the past two days I have been much more withdrawn because I have felt more upset over the entire situation. Also as I have been more short with her she has also withdrawn. Even angry that I won't talk much with her. Go figure! Why should she be the one that is angry over the situation? Oh well. As always, any insight is greatly appreciated.