1. Closure: Being friends with your ex can provide closure on the relationship and help you move on. By remaining in contact and being able to communicate openly, you can gain closure on any unresolved issues or questions you may have about the relationship.

2. Shared history: You and your ex have shared a lot of memories together and have a history that is unique to the two of you. Being friends allows you to reminisce about those memories and keep a part of your shared history alive.

3. Support system: Your ex may have been a great support system for you during the relationship, and that doesn't have to change just because the romantic aspect is over. They can continue to be a valuable source of support and advice in your life.

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https://medicalcaremedia.com/here-are-6-great-reasons-you-should-be-friends-with-your-ex/