How to move on?
You need to give yourself time. You don't have to move on right away. Give yourself time to regret, reminisce & accept. That's honestly the best advice I can give. It differs for everybody because we have our own ways of dealing with loss. Focus on yourself. Give yourself some love. You'll never notice it right off the bat but one day you'll realize na hearing his/her name or seeing them online doesn't make you cry or sad anymore. There's no painful tug in your heart and you've accepted the fact that you can no longer be with them. And you're happier that way.