How to seduce a woman?

i am 19 years old attractive but i have no clue how to seduce a woman, many girls confess they liked me for a long time before they move away ( 4-5 girls) and they told me others do to. excuse the ********* i thought it was nessicary for the question. so why cant i seduce any girls? i am not normally cocky at all. and want sex soon?