How Does Ash Feel About Eiji?

As Eiji insists on assisting Ash in the case of Banana Fish, they become close as they travel the country together, and Ash saves Eiji's life on numerous occasions. Their friendship grows so strong that either would be willing to die without hesitation rather than let the other suffer.

Did Ash Lynx have feelings for Eiji?

Sing in Garden of Light, aka the epilogue to the manga. He explicitly says that Ash and Eiji had a non-sexual relationship, but that they “loved each other, maybe the way lovers do.” The Japanese version has an equally hinting but vague wording, “they may have felt something like [romantic] love.”

Why is Eiji so important to ash?

For Ash, Eiji represents all that's good, happy and safe, and considering all the trauma Ash has to deal with, the desexualization of their relationship can be seen as a way to give Ash security. While incredibly resilient, Ash is a deeply broken individual.