How To Fix It?

Things go complicated... Our relationship not like last time... I can feel that she is getting further than me... IDK how to fix our relationship anymore... When she see each other... Things we can do.. Is smile to each other... Now she's busy with her new life... She's looks happy... Is it I'm the one who make her suffer all this time?? Is it my fault?? I waited for her for along time.. Now my feelings is started to change... Now I like 1 girl... But unfortunately, tat girl is my Bestfriend Girlfriend... So, no matter what.. I have to forget about that girl... But the thing is, someone tell me tat she like me too... IDK wats going on... But for my friend happiness, I'll try to forget bout her... WORLD GOES CRAZY...