Do I continue or quit this marriage,what could possibly be the outcome?This is so unbearable. ?

I saw him greeted my immediate younger sister in an infidel manner,in a way he has not greeted me before,Yesterday in my house when came to see my parents with wine to ask for my hand in marriage. He has once told me that my sister was the first person he saw,dt he was supposed to be with her now not me.I was downcast but honestly I never knew,dt anything was going between them.until the day he came with wine to see my people.What exactly do I do?