My current bf sent me a photo of my ex and his new gf
Whenever my BF and I fight, he always brings up my recent Ex. So today's fight wasn't an exception. He opened up about my ex (whom I don't have any updates or communication with, by the way). He asked me if I knew that my ex has a new GF and how she looks like. I said I didn't and I don't care. Suddenly, he sends me a photo of my ex BF with his new GF.
I'm just curious what this act means. I believe he thinks he can hurt me with that because he often tries to hurt me intentionally. I don't know how to react.