what should i do, i'm kinda unsure, and it's starting to hurt...?

[SincerelyMee]

i really like this boy, i moved to the area at the start of the school year, and this guy was like the only guy who would talk to me for the longest time. and i got to know him, and he's really cute and we get along and we flirt with each other, and we always talk during class, but never outside of the class(we only have one together), and he seems like he might like me, but he has a gf, but they got together before he met me...so help me out, i've tried moving on but i always come back to him