"Dude, you clearly have deficiencies, you should take care of yourself-"
"Mind you own damn business"
It's understandable if a person doesn't see it while their boy is degrading since the process is slow, but if there is a
visible difference after just a few days of healthy eating, anyone with more than 5 neurons in their head would be able to realise that their diet has become a MAJOR problem. C'mon mc.
Who in this state of the world would offer lunch to some random neighbor of almost the same age, with no other motives nor strings attached?
I'm late but I'll still give my two cents:
When you're down BAD (not in a sexual way), even a small positive can mean the world to you. The idea of a developing strong affection for someone who did a small favor while the recipient was in a depressive phase isn't actually that far-fetched. This changes, though, when slop stories make that affection romantic because it's a very different thing. Said affection works the same way you really love your parents and sibling(s), but you wouldn't want to marry them.
Personally, I'm really hoping that this story doesn't go down the path of "I fell in love with you because of that one rainy evening", and instead the incident is just the catalyst for them to interact and fall in love normally