Confused

What would you do or how would you feel if you were in a relationship and the other person told you he doesn't feeling anything for you anymore and doesn't love you...
I have been with my SO for almost seven years we have two kids and just got married a month ago. Last night out of nowhere he told me he has no feelings for me anymore he doesn't feel any love for me is his exact words. Since getting married he feels different. No love no like no interest in me. I'm kinda heartbroken and can't process this