I have been in the same situation and overall only time heals. Getting busy is very important as you realize life is not only about love (the romantical one, at least) and in many situations we will be utterly alone, so the most important relationship you have to work on and nurture is with yourself. It is important to acknowledge and sit with your thoughts and emotions as they come and not always try to run away from them. Believe me, sometimes a little bit of pain works as a balm for the soul, and eventually you will be thankful for having been through all of this.

Also, avoiding hearing from him is very important. No social media, no pictures of him in your gallery, no saved messages, I would delete everything… our mind can play very tricky games sometimes, and keeping memories of him will only make your brain edit and idealize the situations that you went through together,