He's full of sh*t. It's only three words and if you feel that way there should be no reason you can't say them. If he can say "I Love Beer" he can say "I Love You"
That's not to say it's a problem, but I dont think he loves you. He loves having sex.
"Oh Lord it's hard to be humble, when you're perfect in every way. I can't wait to look in the mirror, cause I get better loking each day. To know me is to love me, I must be a hell of a man. Oh Lord it's hard to be humble, but I'm doing the best that I can." Mac Davis