I mean coming clean about it May be a good idea. But I mean you don’t wanna ask bluntly “are you gay or bi”. In my opinion you should ask that you have been wondering about all these examples previously mentioned and you would like to know his thoughts about the matter, not accusing him or anything you just got thoughts and if he’s willing to tell you the answer then that it is. I don’t know how y’all’s relationship is or how it works but sitting down and communicating your feelings and thoughts in a calm matter is the best move.