So I did a love spell

So I liked this boy since 2017 and decided to do a love spell (I was quite young) and then him and his gf of like 3-4 years broke up and then I met him for the first time a month after. I didn’t know at the time that he was even in a relationship but now I feel really guilty. I wouldn’t do a love spell now because now that I’m older, I understand why it’s not okay to do but I can’t help but feel guilty about it. How do I tell him what I did without sounding crazy?