Is your request made one-on-one or in front of the whole "guys" group? If it is not one-on-one, then you have set the other person up in front of the entire group.
> "I feel excluded by 'guys', any chance we could settle on something else?"
In agreeing to your preference this person can no longer use the word 'guys' at all, ever? Or they can, but before doing so must first scan the faces of everyone in the group and if they see you then use an alternate?
This is the problem with personal preferences. They are personal to you, not to anyone else.
If your company orders pizza for lunch and your personal preference is for no pepperoni, then expect that the person placing the order asks for a cheese pizza and several pepperoni pizzas. Don't expect that everyone gets cheese pizza.
> "I feel excluded by 'guys', any chance we could settle on something else?"
In agreeing to your preference this person can no longer use the word 'guys' at all, ever? Or they can, but before doing so must first scan the faces of everyone in the group and if they see you then use an alternate?
This is the problem with personal preferences. They are personal to you, not to anyone else.
If your company orders pizza for lunch and your personal preference is for no pepperoni, then expect that the person placing the order asks for a cheese pizza and several pepperoni pizzas. Don't expect that everyone gets cheese pizza.