@AS - thanks for being gentle with me. I have in complete agreement with you; no invitations whatsoever, no flirting, no touching, nothing.
Only thing that sticks in my mind is that S5 told me he went bowling with his friend Michael the other day - turns out he did no such thing, he was completely lying. So, I guess there is SOME possibility he's not being truthful.........and here I catch myself trying to come up with an excuse for W to make it seem as if she wouldn't do something so awful. But at least I'm seeing it now!
The good thing is that even if S5 came up and said he was lying and W had never touched EA, my boundaries are still in place and will not move. I feel like I'm able to clearly articulate a boundary now that is for ME, and not just in reaction to W.
As far as those that ask what I want - I'd be lying if I were to give any sort of answers. I feel like I need to sit down and write out a pros/cons sheet.