I know how you feel as I was obsessed with a guy when I was in a relationship once and I found out of sight, out of mind helped for me, it's also helped me recently with another guy whose number I added and deleted several times too. Every time after he texted me I deleted it so that I couldn't contact him. Obviously this guy is married with children and you are married so it's the best thing you can do. However remembering for me and fantasising about what could be or have been isn't always helpful for getting over a person either in my experience. Keep yourself as busy as possible and try not to do things that remind you of him. Obviously going to the doctors and dealing with medical problems is not going to help but obviously you can't avoid that. I think for years after being around this guy I was obsessed with I still sometimes thought of him and even in a long term relationship didn't want to rule out being with him which makes me feel ashamed. But I can assure you you are not alone and if you feel you need professional assistance to get past this then fair enough. I maybe should have done that as I never talked to anyone about it for 10 years. Hopefully you can focus on other things soon enough but if you're anything like me and are a perpetual daydreamer it probably won't be as easy as it could be.

Also don't worry about your English, I bet most of us can't speak a word of Croatian, I know I can't!!