Whether you’ve decided at this point to get back with your ex or not, what’s important is that you both learn to forgive each other. Just the mere fact that you’re trying to get back with someone is already enough proof to see that there was something special there.
Take this opportunity to apologize for the bad things you’ve done. Don’t try to justify it. Just say you’re sorry. If your ex comes forward with his or her own apology, be sincere in accepting it. Let your ex know explicitly that you’ve forgiven him or her. At this time, you can start mentioning the good things about your relationship that you’ll never forget.