He hasn't reached out to ask you out, so maybe you can put some thoughts out to him and ask if he has any desire to get together for a drink or dinner. If you can be direct and feel comfortable with whatever the outcome, then what's the harm in putting it out to him. Even if he says he is not interested you are nowhere different than where you are now, except you know you can move on.
Well, if you know he is with his girlfriend still, then I would assume his responses and smiley faces are more about friendship than anything else. If he is not with her, then maybe they could mean he has an interest.
Does his FB page indicate by photos or anything else that he is still with her? You can always send him a note that simply says, would love to get together, but if you have a girlfriend, I understand and am happy to be friends.
So check it out a bit further and then put it out there. You live once, so why not! Best of luck with it. Please take a moment to click on the rating tab to rate my support. Thanks so much in advance.
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