Re: My Girl Friends First Time
How can you "assure her" that her feelings are invalid?
You can't. They aren't.
You can tell her that you're sorry her first time did not feel special enough to her.
You can tell her that you're sorry that she felt rushed and didn't enjoy it much, and that- since you did enjoy it- she's right: it was way better for you than it was for her.
Tell her you wish this weren't the case, but that it usually is (most girls do not actually "enjoy" sex their first time).
Tell her that there's no changing the past, and that all you can do is move forward together.
Invite her suggestions as to how you can make future sexual encounters more enjoyable than the first one was.
Best of luck.