how do i drop hints?

my boyfriend and i have been together for 2 years and we both know we want to marry each other, we've talked about it lots and we both agreed we want to be engaged for a long time before getting married. I already have a ring that i wear and we decided it is my engagement ring, its a promise ring he got me but i love it so much and told him i dont even want a new ring and to just let me know when we're engaged basically. I am ready to take our relationship to the next level and i want him to be too. what do i do? im nervous to just bring it up out of the blue so what are some things i can say?