How to convince my conservative parents about my European boyfriend :(

Hey everyone... I'm 23F and I lived abroad for a year and fell in love with my partner 26M. My parents are very much against love marriages. Now I not only have to convince of a love marriage but also an international, inter-religious one. I'm afraid I will be disowned by them. My partner is willing to do anything to convince them but I don't know how to do it. Every time I try to talk to them, I get very scared and don't say anything. Please suggest.