Was he asking me out, or making a suggestion?

I was asking a man for advice about men, about what is and isn’t appropriate. I mentioned that I once asked a guy friend with whom I was in love if he wanted to share a room together. The guy I was asking for advice said; ‘What about having dinner together?’ i wasn’t sure whether he was asking me out, or simply giving advice, but at the time, I interpreted it as giving advice. Which was it meant as?

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I do have Asperger’s syndrome; and I have difficulty understanding social cues.
Was he asking me out, or making a suggestion?
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