Christian man and muslim woman

Alright so, im a christian boy living in Greece, im 18 years old and before 4years i met a girl living in Saudi Arabia (and yes she is muslim)... Im in love with her... actually, we are both in love so much.. we are living in distance but our love is very strong and we have hope to met one day and be together... the problem is that i cant marry her... because im not a muslim... and we had a lot of fights about it, but in end we choose to get married at townhall and well both keep our religions... anyway we love so much each other that no religion is up of what we have build together... living without her is hell... im getting mad everytime i think about losing her... Anyways... the problem is that her parents are strange... she told me that if i want marry her then her parents need to accept so we can keep forward.. else we cannot marry without father permission... we have made a plan about when ill find job ill hold as much as i can money and travel to her country so i can talk.with her parents... she can wait me of course since the day she loved me.. she cant live without me and she want be with me in this life... i feel like if i lose her ill get serious depression and be sad all of my life... shes painting my whole life, she is the only thing i ever have that i can trust and feel happy... i will give everything to be with her... any advice? what should i do? anyone knows about situations like this? what shoyld i do and how things working on muslim families/saudi arabia laws... because i really need so much help...