Can a guy like 2 girls at the same time?

I have a friend who is in a relationship and he told e that he is having a affair because he likes both girls. I skope with the girl who is also ny friend and she said that he says that he loves her, but he tells me that he loves his girlfrind, and I dont want to say anything about it, but I thing that no one can love 2 girls at once.
Can a guy like 2 girls at the same time ??
Can a guy like 2 girls at the same time?
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