Keep being his friend?

I have been this guy's friend for more than a year. He is now divorced. We teach together. All the high school students think we are a couple. We do a lot of stuff together but it is always at the last minute, it is nothing too formal.Sometimes it is with a group of his friends. I am on a strict diet to get back into a bikini so I am drinking no alcohol whatsoever. He used to like inviting me out to bars to sit with him. We both have liked each other forever, so much that his wife called and threatened me. Nothing has happened, I have not even kissed the guy. At this point I think he needs to grow up and invite me out to do something a bit more romantic, and alone. Does that make sense? Am I being too much of a bitch and expecting too much?
Keep being his friend?
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