Are you guys afraid of relationships too? and how can i get over this fear?

i havent had my first kiss yet and i've never had a boyfriend and im 15. ive had things with guys and they got to the point where they admitted they liked me, and i would always back away for some reason. i wouldnt say i have commitment issues, because i know ill be commited to get married and settle down with a family when im older. but for now, at my age, im scared. i guess it's because i dont want my relationships to get too serious that it's going to end up doing some long-term damage in my life. i just want to be like other girls my age who have boyfriends but dont give a care and only have them for fun. the only thing that's stopping me is my fear of them getting to serious, which is what i really dont want.do you guys have this fear too? and how can i get past this fear?