Why won't he have sex with me?

Hey ladies! I just recently got into a new relationship this month. We were on and off for a year before that. We had been simply inseparable, always together and most importantly always having mind blowing sex. Now we're officially together. He's at my apartment so much you would have thought he lived here! Now instead of giving me attention he rather be in the living room playing his game. I could be giving him great head ready to get it on and he will say no later. This is a shocker to me because no one has ever told me no and especially not him. Its becoming a habit lately. Like he doesn't mind receiving head but doesn't want to have sex. Later will come and he will just fall asleep pretending to put an effort towards having sex. His excuses are im not horny all the time or I'm tired. There's no reason I should have to use my toys while he is here. You think he's scared to get me pregnant now or something? What does this sound like to you? Anybody else having this problem?