How to get your husband to sign divorce papers?

My husband has not lived with me for two years. He just somehow walked out the door and never came back. He did not die, did not disappear, he just settled in another apartment and began to live his life. I was shattered and destroyed, glued myself piece by piece for about a year, and finally returned to normal. I met another man and we want to get married. But I still haven't divorced my ex. I asked him to fill out divorce forms https://onlinedivorcer.com/ga-divorce-online. And he refused !!! How to understand this in general? Now we have to hire a lawyer to get us divorced. It feels like he's just doing it on purpose to give me as much trouble as possible!