Jealous??

Okay so I have been dating a guy since September 2019, but before we started dating i was “talking” to another guy, and we occasionally would makeout/ I’d give him a bj. Well we stopped doing that and just stayed friends but he always says things to bring up what we did and shit. Today he was looking at a picture of my boyfriend and I and said “you guys look like you could be siblings”. Do you think he’s doing this to purposely annoy me? I’ll attach the picture of my boyfriend and I.