Interfaith relationship

Good morning,

I'm new to this forum and I'm currently not a Muslim but I would like to explore my options and I hope nobody judges me. I'm currently in a relationship with a man from Bangladesh who I've met at university. I'm not a Muslim but I have a lot of respect for the religion and other cultures. My sister is currently married to a Muslim man and they're very happy and he's family has accepted her without her converting to Islam. However I feel my position is very different I understand there are many cultures in Islam and the Bengali culture is very strict. The man that I am seeing is very laid back and modern in he's social life. He decided to initiate the relationship with me and I thought there was nothing wrong with it until other people told me I shouldn't be with him because of the cultural differences. I've spoken to him about it , asked him if there would ever be a future between us and I know little about the culture and all he's simply said is he's not thinking about the future and that he wants to be with me. However I want to know the truth I care deeply about him and I don't want to be hurt or used. I just feel he's using me for whilst he's at university as he's social life and family life is very different. I just want to know what would happen if he's parents ever found out about me. I want to be told the truth. I want to be told what changes I would have to make in my life. I don't want to be lied too anymore.

Thank you.