I need help..

Brittany<3 • I love my life, husband and god <3
I don't know what to do, my fiancé 
​Has been nothing but great to me since we got together. But last night I saw he was talking to an x girlfriend and se asked if we were really engaged and he told her no it was all in my head and that we aren't technically together. 
​I honestly can't breathe because I'm in complete and udder shock