Look I had a similar experience and everytime I end a relationship I take the person out of my life. I know you want to look his social media, to send emails and messages, and you will if you don’t cut it out. Delete and block is my first and only recomendation. There is nothing anyone can do for you now but it will last a lot less if you block and delete, from everywhere. At the beggining when our mutual friends would try to talk about him I would cut them off “That’s the past, lets change the subject”.
I know you want to know about him and talk, but don’t. If you do that next week will be a lot easier.