Love / Polish citizen in the UK: I made a mistake and now she won't forgive me, help! [57]

What should i do? she won't forgive me

my name is Jude, 22, Polish citizen schooling in the UK

my girlfriend took naked pictures of herself with my fone but i didn't know
not until my course mate saw them n my fone and he made a pic slideshow
and now it's all over school. She's thinking i did it myself, pls help me
this is the girl i intend to marry after my final exams 2months from now
and she doesn't even want to talk to me. What should i do?

Thanks
Jude.