BOYY TROUBLEEE help please girlss onlyy !!!!!!!!!?

well im 16 a sophmore and i talk to this senior . hes really nice but he usta like mee soo much more at at least it seemed like he did . hes still MADLY in luvv wit his ex and i dontt wanna be used until his ex comes bak . now wen hes upsett he calls MYY BEST FRIENDD ?!? wtff ndd i really like him bua wen i say wat do u want he gets mad and was like i dont want a relationship bua i still wanna talk to u . hes mad confusing help pleasee =/