How can I invite my guy friend platonically without him misreading it?

My parents are going away later in the year for a vacation and I'm house sitting and taking care of their cat for them, while they're away. I am a true extrovert and there's nothing I love better than a good house party with my best friends. I'm planning if my parents agree to it, to invite a group of my friends over for lunch. Most of my guy friends and girlfriends are fine with me, but one guy with Asperger's used to always think that my invitations were sexually based, when in truth even when I liked him, that was the furthest thing from my mind with all my friends. I was thinking that a good way to make everyone comfortable with that would be to invite my two guy friends' girlfriends to join us, but I don't think my parents would allow it as they're strangers to them and I'm an honest person, I don't lie or sneak around. Is it likely to make things awkward if I include him in the invitation when there'll be about six of us there? I'm going to go ahead and throw it anyway, I just don't want anyone feeling awkward or misinterpreting my intentions.

How can I invite my guy friend platonically without him misreading it?
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