Help cold feet

I am meant to be getting married in 2 weeks and my boyfriend has got cold feet , he never believe in marriage anyway and it’s me that wanted to , as I want to be married before having kids , we been together 4 years so we booked it last year , he’s been suffering from depression and has had no work and doesn’t want to live in the uk , wants to move abroad and has been drinking heavy , I don’t know what to do?! Help!