Mc is not some random stranger bro. She is her childhood friend.It's give and take, man. Nobody does this sort of thing for a stranger.
Think about what would make you take care of someone like that. Then apply that towards the girl you love. It takes a lot of effort and It doesn't always work, but sometimes it does - and when it does, it's great.
Yeah it takes alot of effort but my point is the girl as a lover I havent seen that kind of girl but in reality they do exist. Only 2 or 3% out of 100. Its hard to find but yeah if you are lucky guy then you might find that person.