lol no of course you don't say that.
And btw the reason you could not get it up is NOT because you jacked off, it's because you were nervous as hell man! Be honest with yourself here! If this girl really loves and/or cares about you and you share these things with her in the moment it's fine (As long as you don't come across as a girly man) In this case breaking the tension a little. Reassure her that she's sexy, that she turns you on, that you love X about her body because it's so cute...all that shyt counts during sex with nervous girls.
What you should have done is taken charge a little, I like life trainees response because it would have worked well in your case and shows what experience teaches, turn it around and go down on her! After 15 minutes she'd probably be moaning and groaning so much in the ecstasy of her first orgasm that you would have instantly been turned on yourself and Mr Winky would have stood up like super man on steroids.
When you are perfectly comfortable (no odd tensions keeping you from getting it up) you should be able to get it up once every 15-30 minutes at a young age.
Another $100 says she's feeling terrible about it right now that A. She didn't turn you on or B. She didn't do something right and she's a sexual failure
Come clean man, "hey, I was a little nervous it was my first time too (don't be ashamed), and tonight’s going to be even better"
btw. if you need any tips on sex just check out the tips forum, there must be something in there, or you can PM me or any others that offer assistance.
You can do this man, the first time is never the best
jesus chrsit - I just re-read that and fixed all the typos.