Grandma wants me to get married?

I need advice. I am 18 years old. I am dating a guy that I REALLY love I have no doubt but Im not ready to talk to him about marriage and he has said multiple times that he doest want to be married for awhile like 25 or 26 years old.He is 19. But Since this is the guy I lost my virginity to my grandmother believes I am under a curse and that I need to marry him? I wanna marry him. Just Idk I dont want to marry him yet when so many memebers of my family wouldnt support it anyway that is very important to me? And there is a possibility I might be pregnant I just need some counsel... plz?