<human>: Can you condense the text into three sentences or less?

Throwaway because people follow my main.

I have been practicing karate for the past 11 years. I love it. It has made me into a disciplined and more confident person. About a year ago a girl named "Grace" started at my dojo, shortly thereafter her father joined as well (important later). At the time she was 17 and I was 21. She was absolutely stunning, outgoing; one of those glowing extroverted people. 

In the times we spoke before and after class I felt as though there was a good chemistry and just had a good gut feeling about her in general. The age gap between us may have been small but I prefer to stay on the straight and narrow and did not want to do anything with a minor. Which, now that she is 18 is no longer applicable.

Side note: In the year gap of time between her being 17 and 18 I was actively looking at dating other people, don't want to give the impression I just creepily sat and waited for her birthday.

She's a lovely person but part of me worries that she is likely not fully matured yet and may change greatly in the time we're dating. The other thing I need to also consider is that in the scenario where we date and then brake up, I wouldn't want to make it uncomfortable for her and her father to come to karate. Her dad is a really down to earth and cool guy and I would be sad if I ruined my friendship with him by complicating things with his daughter.

Have any of you had success with a similar age difference (18/19 with 22/23 kind of thing)? Was there difficulty with the difference in maturity? Is the risk of making karate uncomfortable worth it?
<bot>: 22M wants to ask out 18F, worried about matrurity gap and potential discomfort at the dojo if things go south.