<human>: We can talk for hours and have both agreed that we've never really met someone like the other. But we're both at different points in our lives where he's looking for someone more long term, mostly likely for marriage and I still have more growing as a person to do since I'm 21 and still want to enjoy my life. Also he says he doesn't want to date younger because he doesn't want to hold them back from going through experiences that he's already gone through himself. 

I understand this reasoning and we're still good friends. I'm not heartbroken, but I'm honestly sad that I can't do anything about this. What should I do now? Does that mean he completely shut the door on us having a future together?

Condense the text into a few key points
<bot>: Age difference is keeping us from dating because we are at different points in our lives. Can we never be anything more in the future?