<human>: EDIT: Thank you all so much for the sincere advice. It seems that there is very little consensus however and I am still so unsure about what to do lol. I think I will talk to him when he gets home tonight though... 

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Since we are still both so young, I debate with myself whether I should consider this an issue yet. SO and I do not live together yet, but it is in the plan for next year. When we generally discuss the far off future, we are on the same page about most things. Big differences include opinions on kids. He is of the mind that without kids, he will feel like he has nothing to show for his life-- no legacy, so to speak. This is a completely valid viewpoint. 

With that in mind, I worry that me not having the same opinion will cause major issues down the road. I assume it is very normal for me to be hesitant at this age, especially considering I am still in school and have so many things to figure out first. However, I worry that this will not change once we are "ready". 

It is weighing on me heavily as everything else is so great now (we are "young and wild and free"). But, what if I still don't want to have kids in the future? I strongly believe this man is my soulmate, so if it leads to us ending our relationship he will absolutely be my "one that got away". 

Any advice on how I can internally or personally handle this now? Is it even an issue? 

P.S. throwaway because we are both massive lurkers.

Can you condense the text into three sentences or less?
<bot>: SO and I discuss the future often, in which kids are a priority for him and not for me. Not sure if I should consider this a red flag now.