feeling empty

I've had an argument with my boyfriend today 
I asked him why you don't wanna marry me I've said to my parents that in the future we'll get married so he replied that when you'll be in university you'll have guys around you and they will attract you and you'll cheat on me I responded that every girl has friends that are boys and it's normal 
So he started to say that i'm not a good girl and that he cannot marry a girl with a bad past.
I'm feeling empty😔 I am a good girl why he's acting like that 
I need your help...