Sometimes it's scary how similar a stranger's relationships and break ups are. I went through something similar about 4 years ago. My advice? Stop talking to him. Delete him off everything. It hurts I know it does. Sit on the edge of your bed and allow yourself to just stare off into space for awhile. Take some deep breaths. I know it sounds tacky, but honestly this is what helped me; Find the saddest song you know. Mine was The Last Song I'm Wasting on You by Evanescence. Play that song you choose in the background on repeat. Maybe cry a bit, I did. Now write a letter. Just start writing everything you are feeling. Don't stop until you are exhausted for words. Cry some more and try to go to sleep. Tomorrow read what you wrote after you take a shower. Really reflect on your feelings and start to break everything down. Question why you wrote certain things, why you feel that way. Just break everything down.

I don't know what it was about reading and re reading and re reading that letter I wrote to myself, but after a while, I had a break through and shrugged my shoulders and just came to the conclusion he wasn't right for me. ( He was also a huge piece of shit, but moving on...)

It definitely didn't go away right away; one day I felt free and the next I sat in bed and cried for hours. And thats fine. All you have to remember is that its okay to be sad and, I feel, to indulge in it for a bit. But eventually you have to say good bye to it and walk away from the sadness and the more you do that, the easier it gets to walk away until one day you don't visit anymore.

This probably just sounds like a long silly reply. But it's what helped me.

It's a grieving process, you just need to figure out what works for you. And it's going to be a struggle, but don't stop fighting!