Ever feel like you aren't moving forward?

I feel like for so long my life has been stuck in one place.  Or on the rare chances we moved forward a step it felt like we ended up getting shoved back like 5.  And since David died I see all these people going on with their lives, having children or whatever and I get jealous.  I want that and I feel like any chance for that has been taken from me.  But I need to stop thinking that way.  I am allowing myself to not move forward.  No one is holding me back but me.  I need to just live, really let whatever happen happen and take it one day at a time and not expect things to get better over night just because that is what I want.  Life doesn't work that way.