Is he interested ir just playing?

Me and this guy at work started talking for these past few weeks. He was the one who started talking to me via text, asking about something i had told him at work. I answered his question and he only texted me the next day. I jokingly called him on that and he said that he rarely goes online, he's almost always busy, can't seem to stand still and relax. But, after that, he started to like my photos and answering more on time, like half and hour or twenty minutes between texts, whereas i answer almost right away (is this a bad thing? Should i be late to answer as well, or will he think i'm just imitating him?). We work by shifts and only occasionally we see eachother. We mainly text. We are almost always flirting and having this conversations with innuendo... He's the one who starts the day texting. And also, i have no idea about his marital status. And i am top shy to ask directly, giving the amount of flirt that has been happening. I know he has a daughter, though. Can you guys give me some insight off whats going on? I am not planning a wedding, i would just like to hang around with him, and have fun.

Is he interested ir just playing?
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