Wow to be 19 again, just be true to yourself and to any partner you meet. The best policy is honesty from the start, that's the only way you can be sure she is right for you and you are right for her. I am happily married for 27 years and only told my wife after 19 years, needless to say it was a shock to her and she felt betrayed, she says that it was as if I was living a lie for 19 years and she was right. We are still happily married and she is pretty accepting but I can't help thinking it could have been better for a long time or it would have not lasted or ever started if I had told her up front, at any rate I owed it to her to be honest from the start. The rest was just being selfish on my part.