get rid of friends who just use me

i used to have ALOT of-i guess u could call them “friends” but i finally came to discover that out of my 50 girls only 5 truly care about me and want the best for me.Right now i narrowed them down to my 3 best friends. It came to my mind that some people just like to use u and then throw u out whenever they feel like it-kinda like a tissue-u blow ur nose into it and throw it away. they get wat they wanted from u but when its u that needs help,they turn their backs on u.i made a mistake falling for people who i thought were my friends then turning their backs on me. Im glad i found my real friends