Friend problem?

ok... well i had this m8 hu had a big sister hu liked me, until one day my m8 stopped takin 2 me... then her sis stoped too... i dunno y it bothers me so much but now i h8 bein around my m8s big sis -- i hav 2 b around her smtimes as my other m8s talk 2 her... now my best m8 mite start goin out wit my m8s, sisters friend... which is goin 2 make it way harder 4 me 2 b around with my best m8.... if this makes sence... can you please help coz its depressin me