My boyfriend (now ex boyfriend) was using me for revenge, 10 years later... isn't this overdone?

I got used and scammed in a short lived relationship. Even though I never got to the stage of actually loving him, I did liked him a lot and did helped him with a loan, which I lost.

Everything was a lie, during the break-up he admitted to only dating me in revenge, now will get revenge on two former classmates (both men), said he'll never return my money, laughed and has blocked me. It took me a while to realize who he was but isn't a decade old revenge overdone? I did acknowledged my past wrong done and tried explaining to him that we were all just 10 year-old kids at the time. Now we're 20, full grown adults. That makes him worse than us since this was calculated. Meanwhile we were all immature, selfish kids back then, not thinking clearly how this would affect someone.

I wasn't the best kid back then but, isn't this too much? I didn't know better. My parents weren't good role models either.

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I want my money back though and I'm thinking of suing him.
My boyfriend (now ex boyfriend) was using me for revenge, 10 years later... isn't this overdone?
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