It's very likely he wants to talk about a work situation where others can't overhear you. Don't hesitate to go.If he has ideas of replacing your current bf, you can explain to him that it's not in the cards.
Ask him if your partner can come and see how he reacts! If he doesn't want your boyfriend/ girlfriend to come, then I'd say, don't go.
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You need to be clear with him that it's just friendship prior to the date.
Its definitely not as just friends
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