<human>: Provide a brief overview of the text.

First, obvious Throwaway, and on mobile typing this, so sorry for formatting errors.

Hoping to get advice, or maybe just get it off my chest, but anyway, I've been dating this Girl who we will call Mary for about 8 months now, and she's my first serious GF.

Want to start by saying it's been pretty smooth sailing, no major arguments or anything dramatic, in fact just got back from a trip and had a great time.

However, the problem lies long term, she's all in and talking marriage and kids within a 3 year timetable. She's dead set on having kid(s) by 30/31. Now, I truly believe she's head over heels for me and I love her, but maybe not quite at the intensity she loves me.

When I'm with her, she's all I think about, but when I'm not, at like work or home, or wherever. I keep having thoughts about, "Could I be ready to settle down and have a family in 3 years? financially/emotionally/etc ", "What if I never reach that same "level" of feelings she has for me?" 

Am I just having future jitters, that's common with a first time prospect of finally facing the end of the road? Or something else? I'm absolutely terrified to bring it up with her, because I feel like there's no good way to do it. 

Anyway, maybe some of y'all have seen or been through something similar?
<bot>: First serious GF is head over heels and ready to go all in within 3 years. I'm not sure if I'm quite up to her level of feelings and her timetable.