Engagement

So my boyfriend has told me tag the plans on proposing. Which I am tottaly psyched about because I love him with everything I have he's my best friend😊 my mother loves him he refers to her as his mother which is kinda weird but cute at the same time weve been together for half a year.. I know I want to spend my life with him by my side we have been through alooooot together and I really love him. We haven't don't the "dirty dirty" and he's not trying to pressure me by saying well were engaged so why can't we he has already told me that wen I'm ready he's ready and that he completly you respects my decisions to wait as long as I need (we're both virgins) I'm not really worried about what our fellow highschool peers will say I've talked to my best friend and she said that if I'm happy and I love him to do what feels right and this really feels right.. I've seen people on here talk about they got married at 17 and my boyfriend will be 17 in January and we're not wanting to get married like as soon as we're engaged it's just our promise to each other to get married is the way I see it. We don't want to get married till we're both done with school. We both really want to take this step..but I'm curious on you guys opinions