I think my boyfriend is gay but he was offended at the birthday present I got him?

I've thought he's gay for a while now, our love life is obsolete and other factors have contributed to my thinking of this. His birthday was yesterday, and I had gone to a shop to buy him a . I really thought he'd like it and I was hoping he would come out of the closet when I gave it to him. He was upset at me when he unwrapped it and told me to leave his house. I've been texting & calling him nonstop since then, but he will not answer or respond. Should I apologize? - Do you think I was wrong? I was just trying to get answers out of him. I didn't think what I did was that hurtful.