What do I do?

Me and my boyfriend have been together a little over two years. We’ve talked about getting married in the past and decided to wait til we are older (I’m 20 he’s 22). I really want to be engaged though and I don’t know how to ask him to ask me to marry him 😂. I really just want to be able to tell people he’s my fiancé or at least wear a ring. What do I do?