I had an online ex when i was 13. He was 33 but pretended to be a teenage boy. He confessed to me that he was actually in his 30s and that he still missed his ex who was in his 20s (22-23?) and that it was wrong for him to talk to me at my age (true).
He eventually showed his real face, which i forgot about, on his instagram (which has either been deleted by him or i forgot the username anyway). He then told me it was my fault because i guilt-tripped him into dating me and also “groomed” him, even though i didn’t make him feel bad at all. I liked him and he showed an interest, i thought he was like 14.
If you still have those messages and they prove that he knew you were a minor and pursued you anyway, you have an opportunity to take a civil lawsuit against him. Considering the age difference the value of that case to you may be significant.