IS IT ME OR HIS BEST FRIEND( whom does he like better)???

hey. I really like this guy we hav been in relation for 2and a half years..we hav kissed and all..But now he his best freind hu is a girl is is sittin rite b4 him..and he talks 2 her a lot..he always supports her..and he cares about her a lot aand watever she sayd he agrees( mayb not everything but mosty agrees)...He still LUVS me he says he not goin 2 break up. but i really feel jelous and hurt..I wonder wether he likes her more dan a friend...AND EVEN YESTERDAY WE KISSED IN FRONT OF HER.. WAT DO I..???????????