Should I break up with my boyfriend?

My boyfriend of 4 years is not the same man I thought he was, I still have a love and attachment towards him but I’ve come to realise I don’t think we are actually compatible even though I love him. He has opened up to me about the fact he is polyamorous, I did what any decent girlfriend would do and accepted this, but he has been speaking to his ex and another girl. To be honest a polygamous relationship is not for me but I love him , however I think this means we aren’t compatible now
Should I break up with my boyfriend?
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