You seem to jump between extremes in your thinking - you've gone from being really keen to do this right now to saying you're a horrible person for even thinking about it in just a few hours!
You're not a horrible person for being interested in this stuff, or for thinking it might be a good thing for your relationship at some point. All people have said is that you should think carefully about when you bring it up, when you open up (if you decide to), and why you are doing it. That's sensible advice for any relationship-changing step! You've decided not to pursue it now, which shows that you have consideration for your partner.
Don't beat yourself up about this when all you did was consider the possibility!
Being proactive is not a bad thing - it gets stuff done. You just need to make sure you don't get ahead of yourself and end up tripping over your own feet in your hurry