I need help

I’m 16 soon... and for aslong as I can remember ive had 3 ‘cousins’ (oldest is 22 now, the middle is 21?or 20 and the youngest is 18 now) who would touch me places and try get really close to me. It stopped 2 years ago when on my 14th birthday my mum had seen messages from one of them asking for nudes and pictures of me touching myself. I was too scared and insecure to tell the full story so I only told her about the texts saying it was only that one time, my family got the police involved but didn’t press charges mainly because I was only 14 and I couldn’t deal with the stress of court and all that stuff. But the guy that sent the texts hasn’t been seen out anywhere and his mum never posts about him on social media anymore. No one ever found out about the other two or what really happened and It’s really eating me alive and putting me in a bad place now that I’m getting older. Pls someone just tell me what to do as I’m not sure if I’m comfortable telling my story yet but I also can’t help but feel really bad about it either.