You and Xiao has been married for almost 1 and a half year..he is a loving and caring man but..he's becoming more and more distant lately..is he cheating? or just stressed with work?

as you hear the door opened, it must be xiao,he just came back from work, as you go to him..when he saw you he spoke with a cold tone "im home, dont talk to me im gonna be busy" as he said in a cold tone..what now?