I may be wronging her, but I have an idea that she's the sort of girl who would want a fellow to carve out a career and what not. I know I've heard her speak favourably of Napoleon. So what with one thing and another the jolly old frenzy sort of petered out, and now we're just pals. I think she's a topper, and she thinks me next door to a looney, so everything's nice and matey.
The narrator reflects on his relationship with a girl he admires, considering her expectations and aspirations. He suspects that she prefers a partner who is ambitious and focused on building a career, and he recalls her positive remarks about historical figures like Napoleon. This understanding leads him to realize that their initial romantic feelings have cooled, and they have settled into a friendly dynamic.
Despite his unrequited feelings, he appreciates their companionship, describing her as exceptional while he humorously recognizes that she views him as somewhat eccentric. Their relationship, therefore, continues on friendly terms, characterized by mutual respect and affection, even if it lacks romance.