hi ! i think i can help you? i got his ending out of chance because all i did was trying to spend time with him as much as i can!!! but i think i can give pointers? btw im doing this out of memory so please tell me if i got anything wrong!!
1. say your a time traveller
2. "im happy with my life right now" (or something like that"
3. say the story is beautiful
4. just spend as much time with him!! bc thats what i did
5. 'keep looking for him'! and after that i think you should be able to get it :)