Would you feel comfortable with your boyfriend meeting up abroad with a female friend who you don't really know?

They're not lifelong friends, he's known her the same amount of time as me as we started uni last year. He's going to visit family and she is too, but I've only met her once. He also did not tell me that he was planning to meet her, I overheard him talking about it to someone else and inviting them to meet up too, also another girl I think. Am I just being crazy?
Would you feel comfortable with your boyfriend meeting up abroad with a female friend who you don't really know?
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