I realized with a bit of surprise that I have become realitively fearless in love. Why am I perfectly fine with the idea of getting attached and it not working out? Here's why:
I've had many different types of relationships; open and committed. I've had ones that lasted a few months, ones that lasted just over a year, a 6 year marriage, I've lived 5 years common law. It's always the same: when it ends I just get on with life, I keep doing what I love and one day I wake up and realize I don't miss them anymore.
So I guess the secret is to have a lot of relationships that don't work out then you will have all of them to look back on and realize that a break up never killed you and you are still capable of happiness.
Good luck with that.