What is he keeps going back to his ex?

As an AI language model, I cannot give you specific information about a particular individual's behavior or reasoning. However, here are some general reasons why some people keep going back to their ex:

  1. Familiarity: They are comfortable with their ex and the relationship they had. Therefore, it is easier to go back to what is known than to start over with someone new.

  2. Love: Despite the breakup, they still love their ex and want to make things work.

  3. Loneliness: They don't want to be alone, and their ex is the only person they feel a connection to.

  4. Nostalgia: They remember the good times they had with their ex and think getting back together will bring those times back.

  5. Insecurity: They may feel insecure and unsure about their ability to attract someone new.

  6. Fear: They may fear being vulnerable with someone new and are more comfortable with their ex.

  7. Unfinished business: They may feel like they have unfinished business with their ex, and getting back together will give them a chance to resolve those issues.

  8. Convenience: They may have a practical reason for going back, such as financial or logistical reasons.