separation and open marriage

this is a long story and I need advice.. Ill try to shorten it. I have been married for 10 years.. We dated on and off .. Like a lot .. Since middle school ... But for a few years I want feeling it. He is great and we get along.. But there is no love. I mean I love him but.. We hardly kiss if ever.. Never hold hands.. Sex only when "needed" really. I never got to do the dating thing. So because of me.. We opened our marriage.. It was mainly me talking to guys. Not sleeping with.. So when I realized it just wasnt getting better we "separated" .. Live together for the kids but doing our own thing. Well here is the issue that makes me done and not even ok with trying to fix our marriage... He told me our bed was off limits out of respect if I ever chose to have sex with a guy.. I agreed... Well I just found out he had sex and had a woman sleep over in our bed while my children and I was out of town. What would you do? We will still coparent and be like bffs cuz we get along.. But he wants to fix it and he apologized .. But I don't want anything to do with him.. Am I in the wrong. I honestly feel cheated on. He had permission to sleep with people but in our bed?! I am heart broken right now..