You can admit you were wrong, you can offer to make things right, but don't apologize. There is such a thing as taking yourself too seriously, however. Never ask a woman if you can kiss them, hug them, hold them, etc.
Okay, so I'm not trying to tell you that your ad is totally unimportant, but it's definitely not the most important thing. Dating, dealing with women, isn't and isn't supposed to be fair. There is no such thing as playing out of your league. There may be all-stars and scrubs, but even all-stars lose and even scrubs can become all-stars with practice. If you plan to get serious with a woman, there are a few things you should take into account. They will signal their interest to you in many ways, but the actual "move" will have to be made by you.The beauty of internet dating is that it gives women a forum to indicate what they want without it being embarrassing or socially "unacceptable".