Hi renierm,
I read something a while ago which I have always felt to be sound advice concerning relationships, it was "Hold on lightly, let go tightly". I have also learnt the hard way that the advice from pollyanna and Edwin is good advice - you cannot change the other person, the only person you can work on is yourself. You are the only person who can really make yourself happy. That alone can be enough to turn a relationship around, and if it doesn't, then you may well find you can bring yourself to feel happy enough to accept that it may simply be time to move on.
Look after yourself well and make sure that you are very, very kind to yourself! From experience I can tell you that meditation, reading books like the Power of Now and other self-help/spiritual growth book section in your bookshop or on the internet will help. If you don't know what to look for, browse through them until you find something which jumps out at you, or which you can't put down, that will be the book with the advice that is right for you at this time - trust me!
I wish you all the best and am sure that everything will work out well for you.
Chris
