luvispower, yes go ahead and delete everything. It will help speed up the healing process. It seems like a dead end road to me. Just keeping one of her numbers is enough to wreck you for months to come because you will be tempted to get in contact with her. Don't waste your life mulling over something that you 'think' is a dream come true that just slipped you by. I've been in that situation before and it is truly dumb to torture yourself while she is out there living life.

All photos, numbers, everything. Get rid of it. Once you've done that, keep yourself busy. IMO, the best way to really rise above the situation is to improve yourself. Go to the gym, develop your social skills, learn a new language, start a social circle. In no time, you'll come to realise the feeling of "hah...she was never worth it".