3. You can work on yourself.
All of us have lapses and shortcomings. No one is perfect and everyone already experienced failures and disappointments, and that’s okay. Now that you are single, you could concentrate on making a better version of yourself. Assess and ask yourself, “What are the things that most people complain about me?”, then from there you start changing yourself, not for them, but for yourself, because you aspire to be better.