Your right it's not easy. But if you focus more on making yourself happy and focusing on bettering yourself for the next relationship by reading books and just trying to enjoy life for yourself it get's easier. Take long walks, enjoy nature, go hiking, biking and just get busy. Sit back and visualize yourself with someone else and how you will be different and how she will be different this next time around. Believe within yourself there will be a next time around.
Work on building your inner strength and knowledge. Think about all those concepts in relationships that all the experts are talking about, relate that to some of your past experiences and prepare yourself for picking the right woman and develop the skills to make the next one a real success.
I am in the middle of a divorce storm, but my heart is calm, my emotions are a little bit volatile, because of the holidays, but for the most part, I am happy with myself and no one is going to ruin me or get the best of me.
I use the new age concepts of the POWER OF NOW and the LAWS OF ATTRACTION. I wake up each morning thanking God for my two girls and how beautiful they are as human beings. I thank God for all those that interact and enrich my life both online and off. I thank God for my family and friends. Then I go about my day reflecting and pondering relationship concepts while thinking I ALREADY HAVE SOMEONE, she just hasn't arrived or revealed herself yet.
What has this done for me so far? I have meet, although strictly platonic online pen pals, the most intelligent, honest, warm, and understanding women in my entire life. A big difference from my usual attraction of the insecure, brainless, heartless, and manipulating types. After all, you can't love anyone unless you love yourself and you can't expect someone else to always make you happy, it has to come from within yourself.
Good luck and God bless!!