Apologize. Think deeply about anything you did or didn't do that somehow contributed to the downfall of the relationship, and clean the slate by giving your ex a proper apology. Take full responsibility for the offense, without blaming your ex, giving excuses, or expecting an apology (or even forgiveness) in return. It may very well be that your ex contributed to the situation, but you cannot apologize for someone else; you can only apologize for yourself. Leave him or her out of it and odds are the apology will be reciprocated.
Though it can be difficult to ask a man what he is looking for, it also challenges you to get one step closer to your goal. The more comfortable you are with this the easier it will become. I know that some people may not always take my advice to challenge themselves and ask the man what he is looking for, so I want to give you some other clues on what to pay attention to if you don’t want to have this conversation with him. Side note, I am in no way I offering you a pass to wiggle out of the conversation! Remember, challenge yourself.