Would you like to get engaged, would you like to get married?
If yes, to all, would you enjoy a proposal? Or would you prefer to decide to get married together?
Would you like to have and wear an engagement ring as a public sign of this? Would you be wanting a wedding ring too? Would he wear an engagement ring? Would he wear a wedding ring?
if you want to get engaged, and married, to him, and would like a big proposal, and want to wear an engagement ring, and don’t mind that he won’t be wearing one, I would do nothing and let him do the proposal thing if that’s what you want.
If you don’t want to get engaged, or married, or don’t want to be proposed to or wear a ring as a public sign to a commitment he won’t share, then I would tell him.
if you want to get married but don’t want to wear a ring or you’d like it to be equal, I’d buy him a ring back so they when he brings out his you can bring out yours, for him. Then he can have a ring too and it would be fun.