Falling Galaxy

After he failed to confess to his best friend, the male protagonist got first-love PTSD. In order to be able to successfully fall in love in the future, he has to find the original object of his affection and work out his issues. But it turns out that that friend who suddenly disappeared eight years ago is actually a god suffering from depression...

(Source: Kuaikan, translated)

Note: Chapter count includes 1 extra chapter.