My boyfriend has a prob saying ilo

So my Boyfriend of 3 years has a problem saying I Love You. He said he a never said it to anyone he hardly says it to his own mother, he's 30 years old and we live together. I say it to him but he never says it back he will say I really like you. I've talk to him about it and he says one day he will once hes ready? Am I crazy for staying with him for 3 years with him?