Often Wonder

I really do wonder some days if Daniel is cheating on me :(
He is ALWAYS last home his finish time is 5.30pm, though he doesnt get home until 6.30pm maybe 7 some days late as 7.30pm....
He is not wearing his wedding ring anymore, hasn't done for a couple of weeks now,
He doesnt seem to show any affection towards me either any more, no cuddles, kisses anything not even an "I love you",
I dont want to ask him if he is having an affair just incase the answer is yes... though in another way i would like to know,
Does anyone know the signs of a cheating partner?