should i stay married?

I have been together with my husband for 11 years, we got married 3 years ago. When we first started going out, I wasn't in love nor really attracted, but I decided to give it a go since he was a nice guy. I didn't think it was serious, I was seeing other guys too, and was not really over my ex. Then about 1 year later he asked me to move with him to a different country. Since I had just finished my university study, I thought it was a great opportunity and said yes. So we moved together, in a foreign country, not really knowing any other people. Being with him all the time, I started feeling really attached to him, I felt I really love him. He was very supportive and kind, he took care of me financially until I got a job. We were like a family. But at the same time I was chatting and flirting with an ex co-worker. During the holidays when we visited our families back in our home country, I cheated. I didn't feel very guilty and I was convinced that no matter what, I still love my boyfriend and he is the one I should be with. I later had an affair with a co-worker, who was too in a relationship. During that time, my boyfriend proposed and I said yes. My affair even wanted us to end our relationships, because we both said we are unhappy. But I didn't want to, since I knew I am better off with my fiancee. After the affair ended (peacefully) I was happy and felt relieved and decided to concentrate on my relationship. We had a beautiful wedding and I felt happier than ever. But not a lot of time passed and I started to feel really unhappy again. Something was missing. I wanted to feel in love. A feeling I never had for my husband. I wanted to go on dates, feel excited..So last year I had another affair. Another coworker. He was single and I fell in love. He knew I was unhappy but never encouraged me to break up, he even said we would never get along. But he did care for me a lot, he was showing that, but denied it, until he admitted he was feeling lonely, but I shouldn't make any decision based on what he says. It went on for about 6 months, and when the intimacy stopped (not my decision) we managed to stay friends and still hung out every now and then and we texted every day. I only then started to realise how much I cared for him. But that ended too, and we are now just colleagues, going to lunch together and nothing more. We don't talk about any private stuff, don't text, but try to act normal, like nothing ever happend. And I thought since everything cooled off, I could feel happy again with my husband. But I feel depressed, I can't get over my affair and I ask myself if there is even a point to stay married, if I constantly look for love elsewhere. If you really love someone, you wouldn't want to cheat. And the cheating was never just about sex, it was emotional every time. My husband and I haven't had sex for 1 year. And before that it wasn't that great either, and we only did it a couple of times a year. But he is the most wonderful man, he loves me more than anything, our families and friends get a long and we've shared so many beautiful moments. He doesn't know about the affairs and I know he would be devastated if I left. We talked about our marriage problems and why we lost our connection (lack of communication, no sex) but he is willing to do everything it takes to get over it. And I'm not sure if I want that and if it is right to try to work it out, if maybe in a few years I find myself in another affair. I am not in love with my husband, and I'm not attracted to him. He is like family for me. I care very deeply for him and it breaks my heart to see him suffer. HELP