7. "i'm sure you can report the posted pics if you are pressed" In response to In response to 0 Thu Jun-22-17 02:09 PM by Selah
(this is all in response to you question about what recourse you have)
pretty much all platforms have a place to submit a misuse complaint
that said its up to them to determine if there is a violation (i didn't see you claim that he is saying your ex-friend took the pic or that it belongs to him)
the SHORTEST path seems to be simply telling the re-poster to change his posting to give you credit as owner of the pic in question