It's challenging to determine the exact reasons for your ex-boyfriend's behavior without knowing more details about the situation and his motivations. However, I can speculate on some potential reasons:
Avoidance: If the breakup was recent or emotionally difficult for your ex-boyfriend, he might be avoiding you to prevent awkward or uncomfortable interactions.
Moving on: He might be trying to move on from the relationship and distancing himself from you as a way to cope with the breakup.
Mixed feelings: Your ex-boyfriend could have mixed feelings about the breakup. Walking with other women, especially those who are slower, might be a way for him to distract himself or reassure himself that he is desirable.
Rebound behavior: It's possible that he is seeking attention or validation from others after the breakup, using these walks as a way to feel wanted.
Friendship or socializing: Maybe he sees these walks with other women as purely platonic or social activities, and he doesn't want to complicate things with you due to the romantic history.
Perceived differences: Your ex-boyfriend might have some perception that you are not interested in walking or that you have different preferences when it comes to leisure activities.
Immaturity or insensitivity: In some cases, people might not fully understand the impact of their actions on others, and this could be a case of unintentional insensitivity.
Regardless of the reasons behind his behavior, it's essential to focus on your own well-being and emotions. If you find his actions hurtful or confusing, it might be best to give yourself some space and time to heal from the breakup. Surround yourself with supportive friends and family, engage in activities that bring you joy, and consider talking to a counselor or therapist to process your feelings and emotions. Remember that everyone copes with breakups differently, and it's okay to take the time you need to heal and move forward in a healthy way.