There could be several reasons why an ex would choose to block you on Instagram but not on WhatsApp:
Selective communication: Blocking you on Instagram might be a way for them to limit their exposure to your social media posts or to avoid seeing updates about your life. WhatsApp, on the other hand, is more focused on direct communication, and they might feel comfortable keeping that channel open for necessary or occasional conversations.
Privacy concerns: Instagram and WhatsApp are different platforms with varying levels of privacy settings. Your ex might be more concerned about their public presence on Instagram, where their posts and activities are visible to a wider audience, while WhatsApp conversations are generally private and only visible to the participants.
Emotional distance: Your ex might be trying to create emotional distance by blocking you on Instagram, as it can be easier to detach from a past relationship when you don't have constant reminders of the other person's life. On WhatsApp, they might still want to keep open the possibility of communicating if necessary, without necessarily being emotionally invested.
Mixed feelings: It's possible that your ex is experiencing mixed emotions about the breakup and their feelings toward you. They might not be entirely ready to cut off all contact but find it necessary to limit their exposure to certain aspects of your life on social media.
Moving on: Blocking you on Instagram could be a part of their process of moving on from the relationship. They might feel that seeing your posts or activities on the platform hinders their ability to focus on their own personal growth and healing.
Respecting boundaries: They might have certain boundaries they want to maintain in the aftermath of the breakup. By blocking you on Instagram, they might be trying to establish a clear boundary while still keeping communication open on WhatsApp when needed.
It's important to remember that everyone's actions and decisions are influenced by their individual experiences and emotions. If you're curious about the specific reason, consider having an open and honest conversation with your ex, but also respect their space and boundaries if they prefer not to discuss it further. It's essential to focus on your own healing and well-being during and after a breakup.