I really need guys opinions on this please?

So my co-worker started working at my job for about a little under a month.

since then he's been super nice. When my other co-worker ask him if he had already met me he said "yes, she's so awesome, she's an awesome person.
then one day he saw me and he asked me if i was closing because he was closing and when i said yes he said "nice!" but he said it all happy.

so far on 2different days he's asked me what kind of music i like and what i was listening to because while we clean up the store i listen to my iphone music.

then recently i was taking a break and i sat in one of the chairs by the stockrooom and he comes by me and says did are sitting out here to be with me in a joking? And i say yes back and he walks away to do some work(since it wasn't his break).

also he asked me if i was closing but i wasn't
then when my co-worker and i were leaving to go home (she's much older than me) he said aw you guys are leaving me already? Aw not cool.

MORE RECENTLY:
today he was happy that i was closing with him, and at one point during my lunch he asked me what i was doing after work and i told him nothing and he said something about our other friend hanging out and i asked him "am i invited?" and he said "Yeah! Ill give you my number later so i can tell you about it(turns out our friend might of been knocked out) then he was super impressed when he realized that i speak and write in spanish.

is he being friendly, or should i be looking for specific things?

All those things just sound like normally friendly behaviour. Especially since you work together.