In my opinion, as long as you keep up the negative self talk of, "I'm too old to fall in love again" you'll never allow yourself to be open to the possibility and will remain depressed.
Really, think about it, isn't that a terribly depressing thought?
But it's a false thought.
There is nothing stopping you from healing yourself and your life, becoming a whole, strong independent woman and then finding someone whom you can have a healthy relationship with.
My Gramps is 85, widowed two years ago and is dating.