Oh no I think I am seeing a pattern and red flags... need the truth?

I just came across this site, if only I knew about the site years ago. Hello, so I am late 40's was in a LDR with my boyfriend, he gave me an "ultimatime" of sorts, either move to me or "I can't make this work and I will be dating other women". So here it is, during our LDR, prior to my moving, he was dating other women while "dating" me. We got over that hump, however I am seeing, observing and hearing the same information and getting glaring reminders of him dating on the side. I have tried to talk and communicate with him, but I am shut down every time, every time, he gets angry, defensive and quiet. He has his ex girlfriend, random girls on FB and a girl from 2020 that he dated. Why, why, why? There is so much more, but I won't inundated the site with it. Any advice, suggestions?

Oh no I think I am seeing a pattern and red flags... need the truth?
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