<human>: Me [F18] and my SO [M41] have been together for about 14 months now and are planning to move in together in the near future. I've tried to bring up the subject of eventually getting married and having kids in the future but he seems very uninterested in talking about it. 

He has three kids from two previous relationships, and has told me that if I want kids we'll have kids but he'd rather not and then discussion ends. I'm fine with that answer. But when I try to talk to him about getting engaged or getting married in a few years he just says no. He doesn't want to get engaged or married, even though to me it's just a way to confirm something we already know - that we love each other. He got engaged four years ago to the mother of his two daughters and it didn't work out, but it hurts me a bit that he won't even consider it with me.

I know I'm very young compared to him, and it feels like there's an important part of my life that I won't get to experience because of this :(

Can you condense the text into three sentences or less?
<bot>: Much older SO won't discuss engagement or marriage in the future because his last engagement failed. I feel like I will miss out. What to do? Throwaway because he's a redditor.