Im i in love with my step nephew???

my sister got married at a young age with a guy thats 10 years her senior.he had 2 kids b4 he married my sister.and after 10 yrs. the kids he had move over here and come in contact with their farther.his oldest son is 16 and im 13. ever since he came here he would try to get with me but i didnt want to make the relationship awkward.until finally i said yes and we got into a relationship with him.it turns out i lost my virginity to him and i started feeling true things for him.me and him were 2 gether 4 1 mth. and 11 days .when he broke up with me i cried now the question is how do i get him back or bo i move on? and is it weird that i feel this way about my step nephew?and by the way hes one of those people that once he makes a decision he never changes his mind.And lately i cant stop thinking about him!!i know sleeping with me was nothing because he had slept around but for me it was special!!