How do I Propose to My Celebrity Boyfriend?

I am a 20 year old gay man in the US. I have been dating this celebrity (who is not out and doesn't plan on coming out soon). I won't say who he is but he is one of the main characters on a popular TV show which gets about 10 million views every episode. We met while he was promoting the show at Comic Con in New York. As previously stated, our relationship is not public. The only people who know about us is his immediate family, his close circle of friends and his co-stars on the show, who btw are all very supportive. Recently I was in a bad car accident here in LA and almost died. He came to see me and cried about me being in the hospital. The doctor said I will recover fine though. (Yay!) The whole incident made me realize that I want to be with him for the rest of my life (and not because he's a celebrity). But because everyday I'm with him, I don't feel weird or alone or different. I feel unconditionally loved, something I wasn't getting back home in upstate New York. And his fear and concern at the hospital only solidified my feelings. After I get out of the hospital, I wanna to propose to him. But I have a few fears: 1. Will he reject me? 2. How can we keep it a secret? 3. What kind of ring to you get a rich, successful young actor? Lol I just realized that life is way too short for regrets and I just want to tell him how much he means to me. Any advice?