just curious what this dude means

so I'm happily married, well for the most part i am. like 90% happy but we've been in a rut lately. anyways, there's a guy i work with that i find really cute. nothing more than that, and we've hung out after work with other co-workers together and it was fun. we have a "group" that always goes out for a couple beers after work. well i sometimes catch him staring at me at work, and yes that obviously means i sneak in a look at him too, because hes cute. but we went out last night with the group, and he kept talking about "his girl" (i knew he had a gf and daughter the first time we went out) and i asked him if his gf had a problem with him going out all the time because my husband does. he said "what? We're not together" which he had said that before but then he always calls her his girl so i was confused. so i told him "well you call her your girl so i just assumed that meant gf" and he said he wants to get back together with her but she doesn't and he doesn't want to bring anyone else into the picture because his daughter is too toung and fragile for that. which i totally understand, i have 2 kids myself. but i was like "oh okay, didn't mean to pry, im sorry" and he said "no you're fine, it's not prying unless ypu can't see whats in front of you" or something like that. well that confused me but i let it go because he was starting to feel his drinks. the night goes on and he keeps looking at me. like more than usual. and the last time we had gone out with our friends i mentioned to one of my guy friends thats very feminine and also basically family, that a guy who can dance intrigues me. which is true, I've always loved a guy who can dance. and he heard that. so back to us going out last night, he asks all of us why no one is dancing at the bar. i told him because most of us can't dance lol. well he spends half his time there dancing after that. so then me and my friend go to the bathroom and when we come out he's standing with one of his friends talking but facing towards the bathroom. so when i go to pass him to go back to my seat he barks at me! not like woof woof but he lets out a little growl bark. And his friend heard it too! he tried explaining why he did that but he was drunk so i just let it go. idk, sorry it's long. but if we're going to be working together it doesn't need to be awkward..