<human>: We'll call her Emmie. We met/became fast friends when she was 17 and I was 23, and got closer over the next two years. At first it was definitely somewhere between a mentor/friend role, but over time it developed into a genuine friendship, especially post high-school. 

We've always been extremely compatible, but we were both in long term relationships. This past summer, both single and back at our shared summer job, we got together fairly quickly and it's been pretty much smooth sailing since then. At first I was really worried about what our mutual friends would think, but everyone that knows us says it makes sense. 

Obviously it's easier to live in a bubble during the summer, and she's back at college now and I'm back at work in the city. It's still felt/feels like a healthy and happy thing for both of us though - we're both good at communicating, and have talked about all aspects of this. My biggest concern, which I've voiced to her, is that I'm preventing her from enjoying all the fun, formative experiences in college (like having that random drunken hookup, etc). And we've both given each other permission to have fun within limits. We're both pretty entertained by any random drunk make-out stories, etc. She's very mature (I've never dated anyone younger than myself so this is really new for me), and I want to take her at her word, but I also don't want to be the irresponsible adult who should know enough to walk away and let her have a 100% normal college experience. What do you guys think?

Can you summarize the given text in a few sentences?
<bot>: I'm 25, SO is 19, things have been great but I'm worried she'll miss out because of me.