The things I did to get over a bad past relationship:
1. I wrote down all the reasons why I left my ex-partner to remind me why this relationship was no good and had no future.
2. I made the decision not to go back EVER but to be free to meet someone new eventually.
3. I was lucky and had ties to this ex (no children, property or money), so I decided to not have any future contact with him - no meeting, no phonecalls, no letters, no texts, no emails etc, and to get on with my life alone.
4. (The following is a bit drastic but it worked for me) I got rid of everything he ever bought me, gave me, or that reminded me of him. It meant getting rid of a lot of stuff but I asked myself "would I rather have the thing or the pain and memory that goes with that thing?" I had a lot of stuff that reminded me of him, but as soon as I got rid of the stuff I felt so free of him. It was like purging him from my life.
5. I put a saying on a card on my dressing mirror which I read every morning and every night - "You have a husband waiting to meet you and children waiting to be born" - I repeated this saying often like a mantra which got me through the darkest of days.
Although the ending was very painful it got better with time. Time heals all wounds. A few years later I met my husband, the love of my life who I would never have met if I had still been with the ex, and now I have a beautiful baby daughter! I am truly happy now.
You will get through this. You deserve to be happy and you deserve the best in all things. Believe it.