Does he like me? please help me with this question!!!?

One day I was at school and during homeroom I was heading to the library and this boy who was in my homeroom was also going to the library and I went a different direction to the library because I didn't want him messing around with me (you know) so once I got up to the library he comes up to me and says " how did you get up here so fast? I ran the whole time" so was he flirting with me or was he just joking around?