What to do now?

Hello all, I'm 7 days into divorce and I feel worse than when I found out she cheated which led to our divorce. Everyone around me says how lucky I am for discovering the affair, leaving the marriage with the house in my name, our 3 kids who live with me indefinatelty and not paying a dime for alimony despite being married for 14+ years. Why dont I feel so luck? For starters, I was betrayed by the one person I trusted, my best friend, my only friend, my life partner, my former wife. She has changed to someone I cannot respect nor look at. I mean it she completey did a 360. All for a lust connection. How do you walk away from a life built and worked on for all these years. She never told me how much she resented me or hated me until it was too late. Now I am sitting here with constant bouts of doubts, low self esteem and utter fear for what might be. My children are rocks and I love to them death but even that hasn't stopped me from having thoughts of no more. I miss her so much despite hating what she did and who she is. I got alot of advice over the last couple months but I'm struggling to cope and even manage my day to day. I have no friends and my family is tired of my depression. I work, come home and take care of my kids. I have no hobbies and my passion was her. I lived to love her and now she is gone. I'm trying to stay positive and strong. Building a better relationship with my kids. I don't know anymore and yes said my kids. I know they are hers too. Support welcomed