My Boy friend and I have been together 2 years?

He used to be so attentive and now he acts like he doesn't even like me I have helped him so much he doesn't even show affection Ive talk to him and nothing changes what should I do??? And his own family has nothing to do with him,,, Hes 47 Im 44 and I don't like his tone in his voice when he talks to me I hang up if im on the phone and he gets that barking tone. he was so nice in the beginning. You wouldn't believe how attentive and nice and into me he was""" Im so confused at this change.... I try to talk nothing changes... Help