My son hates tummy time..? ?

He's 3 months old. He stands already. He's rolled over. He holds his head up very well. He's already on baby foods. He sleeps all night. He doesn't like daytime naps but that doesn't bother me. He's happy, laughs and smiles all the time!! The only problem is he HATES tummy time. I barely do it once a day because he gets so mad that he buries his face in the blanket he's on. It troubles me because he uses his legs (when he's on his belly) just like he would if he were crawling.. But I know he needs to build his upper body strength up. People have asked me if he's advanced for his age.. He is very smart and loves to "talk" to people. So I know he could be an early crawler/walker.. If he's on his back he can scooch himself with his legs.. What should I do? I don't want to force him to do something.. Is there any other way to build upper body strength that I can try? Any advice will help!! Thanks :]