Contact a good divorce attorney in your area of where you have lived 6 months or longer. Explain that you have been abandoned and want to file for a fault divorce. There are two types of divorce. No fault and fault. No fault, it would be an agreed divorce. Fault, only one party agrees on the divorce and obviously he can't agree on the divorce because he left you. You would then file the divorce papers. Being that he cannot be located, you would simply file it in the newspaper under notifications. This is solely for this purpose. This will run for 30 days. Someone in his family, friends, etc. will contact him regarding the divorce. If he does not respond to your lawyer within 30 days, you will be awarded the divorce based on default. So be sure to ask for everything you want in the divorce, be greedy since he walked out. Goodluck....