Wandering Intruder

I was suddenly transferred in another world without realizing, I thought I could return to my former world when I asked Syldrya but turns out to be impossible. After a very long time, she revealed to me that I was a former god of this world, she also said that I once sacrificed myself to save this world from it's destruction. I don't if she tries to prank me or what, suddenly talking that I'm a god, that's just ridiculous. I still don't believe it since I always have this thought in my mind that tells me that she's just joking. Welp, let's just pretend to accept it, she's a goddess who can't afford to be kept in the dark. A notorious goddess since ancient times, she helped me adjusting in this new world for my everyday life. She's a very important person in my life that's why I would sacrifice everything even myself just to save her and what she holds dear.