Me and partner were together for 6 years and split up a week ago. The first 2 years were great but the remaining 4 years or so were bad and gradually got worse and worse. Always arguing, he was nasty to me at times and in all honestly I could be nasty back at times. I'm my head I know its the right decision to go our separate ways. The relationship was toxic and was never going to go anyehere and we were just hurting eachother. Since splitting up I had a few days where I was fine, getting on with it and just feeling quite normal. Today I have woken up with this gut renching feeling in my stomach. It was his birthday on Saturday and all sorts of thoughts are going through my head. Did he go out? His friends are all single so did they take him out to get laid? Even though we aren't together anymore the thought of him sleeping with someone else kills me. The thought of him being flirty with a girl kills me. Even the thought of him being friendly with a girl kills me. I have picked up my phone around 100 times today just checking to see if I have a message which I know I won't but I can't control myself doing it. Is this normal splitting up behaviour or am I being obsessive. I feel low, can't eat today and simple things like cleaning the house feel impossible. The truth is I can't be with him but I really don't want him being with anyone either, although I know it is none of my business. Am I going out of my mind or is this normal?