I first met my now-husband in sixth grade, starting dating freshman year of college, got "semi-engaged" a year later, "for-real engaged" about a year after that, and then married five years after we started dating. Now, two & a half years after we got married, we are still getting used to living together and constantly finding out new things about each other - because people are complicated and that's what makes everybody interesting
So personally, I'm a big proponent of pacing in relationships, just taking things one step at a time, but you gotta do what works for you.