<human>: Sorry if this doesn't flow very well, I'm on my cell phone.

We have been together for two years and have always been open about everything. I have always known he doesn't want children and he has always known that I do want children. However, I don't want children for another ten plus years. So we decided to stay together until then. Being that we're so young, the chances of us staying together that long are slim. I would never press him to change his mind because I do not want him resenting me, our children, or himself. 
Two nights ago we were drinking at home and he told me that he feels like we have no future, naturally, I understand. We decided we still want to stay together, but he wants to be in an open relationship. We've talked about it before, we both think it would be fun/beneficial. I know that right now I can't emotionally handle it though. I'm pretty confident in myself but I'm still a jealous girlfriend. Not overly jealous, but I mean I still have feels. He wants to start the open relationship now because he feels like he's just going to get older and unattractive. He said he understood how I felt and would be patient with me. So we're not rushing into anything. 
We both love each other very much, we're each others best friend. But it has been awkward since then and I feel like he's unhappy or weary. 
Any advice that you guys can share with me? Will it only get worse from here?

Can you provide a brief overview of the text?
<bot>: my wonderful relationship of two years is starting to crumple over a disagreeance regarding children. Something that shouldn't be a problem for ten plus years. Are we just kicking a dead horse?