My boyfriend may be talking to other women

I have a gut feeling my boyfriend is talking to other women. But I can't prove anything because I have never seen him do it.

I've seen him liking a lot of girls pictures online and commenting on them when he didn't even have any contact with mine. Never liked any of my photos and he never says I'm beautiful anymore.

I've tried to talk to him about my anxieties, saying that I'm scared there is someone else or that he doesn't love me anymore but he just gets angry at me and then ignores me for a day or two.

I don't really know what to do because its just this gut feeling, but I don't want to start accusing without proof. I've though about cat fishing him to catch him out but I don't want to stoop that low. Plus since our last argument he deleted all of his social media.

Edit: when I say talking I mean like flirting and having message flings. I don't get angry at him having generic conversations over the phone with women.