This is a how men work Aibu...
He has asked me to go out for a drink, he knows I'm not available and I've said previously (months ago) we could be friends. We could, he's definitely a lot like my friends.
Out the blue, he's asked me out for a drink again. I'm popping by his work tomorrow to say...
AIBU to say, yes but as friends?
AIBU to say yes at all?
I need help with social rules and I don't know how it works with friend zoning someone who likes you?
I'm not 'available' because I'm in a long-standing (4year) long distance relationship. And I wouldn't be unfaithful, but again how does this work - is it against the rules?
My DP knows about this invitation. Was open and kind but said yes it's a come on, and kind of assumed therefore I would say no.
There is other backstory but I honestly don't get what's right and wrong paths here. I'd like this guy as a friend, but is that mean to him. I certainly don't want to say no to friendship out of fear of 'displeasing' my DP.
Honestly really confused. Really grateful for any thoughts at all. 
