Your own mirror is what you should really be looking for. You know what that means. Almost all of what you see from her is going to be vague and may mean nothing. She puts on a show just like you do at times so it's never really solid info.
Example, my wife shows me no tears over the situation but I know from other sources(that I'm trying to remove) that she cries all the time. So what happens if I look at the no tears. I focus on her not loving me and being fully done with no hope. The other side is I look at the hidden tears and believe its for me and/or the marriage. I start to think she's rethinking things and could change her mind soon. I've seen these signs multiple times and got my hopes up, it hurts. In the end it may mean a trying and we won't know for sure until something happens to directly change it. Remember, this isn't all about you.
So you stay on course and focus on you for the most part. The more you look for those signs things are getting better the more your mind will find them from nothing, and the bigger dissapointment.
When/if she wants to come back you will know it. You see the signs she's latching onto you and doesn't want to let go,keep that tiny sliver of hope things may change and don't over think it anymore than that.
Accept what is, let go of what was, and have faith in what will be