Injustice to Singles IG??

Why is it so that every boy who has had a relationship or has a GF, can get a new girl easily after sometime but the ones who are single remain single everytime ?? Like when my friend had his breakup he eaily got other girl but my other friends and me myself are still singles XD ( Please this is question asked for curiosity not any hatred for boys in relationships or singles, Mene generally aisa hi dekha hai har jagah your experiences may differ!! )