Should I break it off with this one guy who says he wants to be there for this girl from his old school during her bad marriage?

Me and this guy have been seeing eachother for a couple months. He says he wants to be with me, thinks I'm perfect, etc.

On the phone he told me this girl he went to high school with messaged him. She said hey to him then said she was in a rough patch with her marriage. He says he wants to be there for her, but doesn't want to make the husband mad. Obviously this girl likes my guy. The fact that he may be feeding into it really makes me upset. They'll end up liking each other, bla bla bla. If a man who had a rocky marriage with his wife messaged me for comfort, I would ignore him.

I'm thinking of just leaving.

Should I break it off with this one guy who says he wants to be there for this girl from his old school during her bad marriage?
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