Someone i met on instagram.

I have met this dude, 29 years of age  and i'm 19, so we're 10 years apart,  is not big of a deal because i'm a legal adult, but the problem is, there is this time, i just woke up, and he sent me a whole paragraph, of him saying he been dating a 17 year old ( he was still 29 at the time ) and since he also sends me pictures with nudity in it ( he also did with my girlfriend ) i assume he did the same to them, i tried to contact the cops, but they said the legal age is 16 and there was no harm, so i don't know if i did something right or wrong, i saved up some pictures