You haven't been caught up in this for a long period of time, so that you have these thoughts is normal. Our minds allow us to cope with all of this in different time frames. It protects us and allows us to deal with things when we are able. Some never give up hope. That doesn't mean they don't detach and move forward with their own lives though.
That you believe she will come back, gives you hope. Hope is not a bad thing. It doesn't mean you get to kick back and wait though. It just makes the road you're traveling on more pleasant. As to the final destination, that remains to be seen.
Look forward and take the actions you need to take to be the best expression of you. Regardless of how it all turns out in the end, if you work on you and take the high road, there won't be many (if any) regrets.
