Why don't i have a boyfriend?

i have lots of guy friends but not a boyfriend. is there something wrong with me? im 5'5'' and 110lbs and im on the track and cross country teams, so i dont think im fat. im really fun and easy going, so i dont think my problem is being too high maitinence. people say im nice and funny. could it be the way i look? i have long, wavy blonde hair and blue eyes. i get told i look like taylor swift a LOT, and i guess i sorta do, but i dont get why that is because if i totally did, wouldnt i have a boyfreind? i dont need a bf, but any tips?