I think about this and my first instinct is to say no, and then I think more and its yes, why is that?
To begin with I think no because its just a guy friend and there’s nothing more, if your boyfriend is fine with it and respects that you will stay loyal to him then its fine. but it also can be risky if your guy friend could have feelings for you.
Other people could say yes, because you are going to a party without your boyfriend and you could be doing things without him. If he is not there then you could be tempted to not be loyal and do stuff with the guy friend.
In all it depends on how loyal you are, how respective your friend is and if your boyfriend trust both of you guys.
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