[Sundae]

You don't need as much help as you think you do Fresh.
You've made a mature and emotionally sensible decision. All you need to do in the immediate future is let the dust settle. This isn't Hollywood, you don't need to finish one relationship and immediately start another.

It might feel peculiar at first, you might end up calling her and get the cold shoulder or she will call you and you won't want to talk, but you'll work it out between you.

In the mean time make time for yourself. Do things she wouldn't have wanted to do. See people perhaps she didn't like to see. And DO THINGS ON YOUR OWN. It's incredibly liberating to have the experience of eating a dinner alone, seeing a movie alone, going to a new place shopping alone. I don't recommend it long term, but if you do it now it won't seem so daunting if you're ever thrown on your own devices again in future.