Keep yourself busy with work, family/friends and interests and work further on rebuilding your own self esteem and worth. Such men really damage that.
Why would you want him to change his mind, for goodness sake do not demean yourself further by doing the pick me dance and or maintaining any form of contact with him. Keep your dignity intact.
I think you actually dodged a bullet there with him; there's a lot of red flags surrounding him not least of all the wanting for you to be engaged to him after only 10 days and being married within a month and separated within 10 months. What does that tell you about him?. Men like this who come on very strong can actually be controlling by nature as well emotionally abusive. He has used you and spat you out.
I would also suggest you read "The Loser" by Dr Joe Carver as this will further help you too. This excerpt is from there:-
"The Loser" has very shallow emotions and connections with others. One of the things that might attract you to "The Loser" is how quickly he or she says "I Love You" or wants to marry or commit to you. Typically, in less than a few weeks of dating you'll hear that you're the love of their life, they want to be with you forever, and they want to marry you. You'll receive gifts, a variety of promises, and be showered with their attention and nice gestures. This is the "honeymoon phase" - where they catch you and convince you that they are the best thing that ever happened to you. Remember the business saying "If it's too good to be true it probably is (too good to be true)!" You may be so overwhelmed by this display of instant attraction, instant commitment, and instant planning for the future that you'll miss the major point - it doesn't make sense!! Normal, healthy individuals require a long process to develop a relationship because there is so much at stake. Healthy individuals will wait for a lot of information before offering a commitment - not three weeks. It's true that we can become infatuated with others quickly - but not make such unrealistic promises and have the future planned after three dates. The rapid warm-up is always a sign of shallow emotions which later cause "The Loser" to detach from you as quickly as they committed. "The Loser" typically wants to move in with you or marry you in less than four weeks or very early in the relationship".
The Loser" never sees their responsibility or involvement in the difficulties in the relationship. From a psychological standpoint, "The Loser" has lived and behaved in this manner most of their life, clearly all of their adult life.
As they really don't see themselves at fault or as an individual with a problem, "The Loser" tends to think that the girlfriend or boyfriend is simply going through a phase - their partner (victim) might be temporarily mixed up or confused, they might be listening to the wrong people, or they might be angry about something and will get over it soon.
"The Loser" rarely detaches completely and will often try to continue contact with the partner even after the relationship is terminated. During the Follow-up Protection period, some guidelines are:
Never change your original position. It's over permanently! Don't talk about possible changes in your position in the future. You might think that will calm "The Loser" but it only tells them that the possibilities still exist and only a little more pressure is needed to return to the relationship.
Don't agree to meetings or reunions to discuss old times. For "The Loser", discussing old times is actually a way to upset you, put you off guard, and use the guilt to hook you again.
Don't offer details about your new life or relationships. Assure him that both his life and your life are now private and that you hope they are happy.
If you start feeling guilty during a phone call, get off the phone fast. More people return to bad marriages and relationships due to guilt than anything else. If you listen to those phone calls, as though taping them, you'll find "The Loser" spends most of the call trying to make you feel guilty.
In any contact with the ex "Loser", provide only a status report, much like you'd provide to your Aunt Gladys. For example: "I'm still working hard and not getting any better at tennis. That's about it."
When "The Loser" tells you how difficult the breakup has been, share with him some general thoughts about breaking-up and how finding the right person is difficult. While "The Loser" wants to focus on your relationship, talk in terms of Ann Landers - "Well, breaking up is hard on anyone. Dating is tough in these times. I'm sure we'll eventually find someone that's right for both of us." Remember - nothing personal!
Keep all contact short and sweet - the shorter the better. As far as "The Loser" is concerned, you're always on your way somewhere, there's something in the microwave, or your mother is walking up the steps to your home. Wish "The Loser" well but always with the same tone of voice that you might offer to someone you have just talked to at the grocery store. For phone conversations, electronic companies make a handy gadget that produces about twenty sounds - a doorbell, an oven or microwave alarm, a knock on the door, etc. That little device is handy to use on the phone - the microwave dinner just came out or someone is at the door. Do whatever you have to do to keep the conversation short - and not personal.
DO NOT LET HIM BACK INTO YOUR LIFE.