I feel days like this too where I miss him. Even though, I have alot of Post Tramatic Stress from him that I am trying to work through. I also have many "triggers" in my daily life that reminds me of him and all the bad times, so that doesn't help much. They hurt us so bad that when its over, we want to run to them to make that hurt stop. But, they are the ones that made us hurt in the first place so its like a Catch 22. At least that was what I did in the past when we would break up. I went back to stop my hurt but I just wound up being hurt 10x worse each time and now see a therapist to get over all the stress and trauma that I still have even though the relationship is completely over. Relationships are hard enough to make work. Throw in an addiction and they are about as close to impossible to have a good outcome is what I've learned the hard way.