How do I NOT regret a relationship like my ex who said she didn't regret anything?

She said she didn't regret anything in our relationship, which is good, but I can't help but dislike how we kinda wasted eachothers' time and money. We traveled to different states and to Mexico, and I introduced he to sooooooooooo many new things sexually, restaurants, and new places. I feel kinda bitter. How do I not regret and not feel bitter about a past relationship?

How do I NOT regret a relationship like my ex who said she didn't regret anything?
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