In order for him to be "the one" he would have to see you as being "the one". At the very least a (soul-mate) is someone who (wants) to be in contact with you!
Actions speak louder than words. You can't make no one love you the way you want to be love. It's up to you to choose someone who already is the kind of person you want to be with.
Oscar Wilde once said:
"Never love anyone who treats you like you're ordinary."
If your boyfriend ignores you and doesn't bother to answer your messages clearly he no longer thinks you're "special". Move on.
1. Accept your relationship or marriage is over
This is the most difficult step of all. It requires one to remove their "rose colored glasses" and stop "romanticizing" the past. Odds are you have "conveniently forgotten" things you disliked and major disagreements you had. It wasn't all sunshine and rainbows.
Closure is often a term bantered around after breakups and divorces. However needing your ex to do or say something before you can move on is not empowering yourself! There is nothing your ex can say that would make you feel better about having your heart broken. The reason why one person ends a relationship with you could be the very reason why the next person falls madly in love with you. It makes no sense to attempt to change for your ex. Theoretically getting closure sounds like a good thing but in reality waiting around for closure is giving power to your ex to determine when you can start taking steps to move on with your life.
2. Put things in perspective
As I stated earlier; In order for (him) to be "the one" he would have to see (you) as being "the one"! At the very least a "soul mate" is someone who actually wants to be with you! That rules him out as being "the one".
3. Make room in your life for someone new.
This means putting away any old photos, cards, and other mementos you may have around you.
Your future lies ahead of you and not behind you.