Probably. If I were that guy, I'd probably just not know if that girl liked me so I'd go and flirt with some other girls too and test the water to see if those girls liked me. If a dude says he likes you its a high chance that he does.
some men love all girls, just for their looks, some men love them for their personality, some men for both, its who you chose that makes a difference, if this man flirts with other girls but says he likes you, hes just trying to impress you, yet he doesnt love you enough to just focus on you, i wouldnt get interested in him.
it really depends on the guy, alot of guys don't even notice that what they are doing is flirting, they just kinda follow the flow of the conversation and try and keep it casual and un-awkward, then there are the other guys who do it deliberately just because they enjoy messing with people's heads, you'll have to figure out which type this guy is though.