Am I afraid of commitment?

i am sort of going out with this guy that ive been flirting withall year. usually when i start to like a guy and we start to move forward i get all freaked out and hurt him some how. but with this guy i acually really want to get close and kiss him (by the by ive nvr kissed anyone b4 and im a junior in highschool) but it freaks me out and ive tried to push him away, a couple of times acually and i can nvr move on. ive been told that i am afraid of commitment, is there anything i can do to get over that? i dont want to get freaked out anymore. i want to live my life like a normal teenager!! everytime i try to kiss someone i chicken out too and i over think it...can anyone help me?