SPOILER AHEAD>>>DONT READ!
Kk ill be brief.
IN BLF, jassi comes bak to gulmohar and shes ignoring armaan because armaan gets back with mallika. but then armaan realizes that jassi is his only love and he leaves mallika. armaan realizes that jassi hates him so he announces that he is leaving gulmohar and the country itself. then mallika goes and tells jassi that armaan really loves her.
meanwhile, armaan is saying goood bye to staff and jassi comes to him and armaan says jassi plz forgive me and gives this long speech abt forgiveness and jassi replies "I HAD FORGIVEN U LONG AGO. I FORGAVE U ON THAT DAY ON THE BEACH" so this whole time she just wanted to stay away from him becoz he was with mallika.
yeh i hope that makes sense. i read the summary a couple of months ago so some little details might be wring but the overall thing is 100% correct.
SPOILER ENDED>