I Catfished My Ex and Told Him About It?

When we broke up months ago, I needed closure and an explanation but he never gave it to me. I tried to move on and even friend requested him on Facebook and Instagram but he never accepted it or denied it so I decided to pretend to be another girl so I could fool him into falling for me (I know how foolish it sounds) but as I was talking to him I started liking him again.
This only lasted for a week until today when he wanted my phone number because talking on Instagram spends the battery too much. To that point I couldn't take it anymore and told him who I was and why I did what I did and, by surprise, he took it lightly. He said it was okay and I didn't hurt anyone. I asked him various times not to tell anyone and he said he wouldn't but should I trust him?
I Catfished My Ex and Told Him About It?
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