I seen alot of these to know how the fuck this is gonna end up.
a) somehow his power is fixed / removed by a god/goddess and the cupid princess still loves him. He ends up with the cupid girl from all the in-between stuff thats gonna happen from here on out. childhood friend probably rejects him at some point in the future.
b) He ends up with a good harem ending, marrying a select few girls (human/demi-human) that REALLY like him, including his childhood friend. I personally dont like harem endings that much except a very select few.
c) Beta Self-Cuck No Harem No Girl Route. This ending sucks, but it happens quite often not to include it. somehow he ends up with no fucking girl and thats it.
d) Somehow he ends up with childhood friend cuz fuck story amirite?