I always call my boyfriend and everytime I talk to him he would say call me at 12 and say hes tired?

You have to know what he does that makes him tired all the time. If he doesn't do anything that could make him tired then i will say he is tired of the relationship but does not know how to tell you or he must have met another lady and does not like you anymore. My advice is for you to give him a break; stop calling him and see what he will do; then you will know if he is still interested or not. Wish you luck