If you have two girlfriend, what will you do?

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I have a friend in my town, he is as old as me. his name is jhon. after 4 years I know him, I still don't know about his love story. but yesterday, I know that he is not only have a girlfriend, but two, yes two girlfriend! now, he is confuse withb those 2 girl. he asked me to give a solution to him, what will I do if I were him? Now, to help my friend, would you guys give me some advices to solve this problem?