In close relationships, Pluto in Virgo tends to show up quietly but densely. This isn't the person who makes grand declarations of love; it's the one who brews the tea when a partner has a headache, remembers the prescription, notices you've slept badly for the third night running. It's a form of love expressed through service and through care for the small domestic things — and to many partners it reads, unfairly, as "they don't know how to show feeling", when in fact the exact opposite is going on underneath.
The weak spot, in my experience, is the slow drift of turning a relationship into a project. The partner gradually becomes the object of constant revision: their habits, their eating, their schedule, the way they phrase things. The criticism rarely arrives dressed as criticism — it comes as help, which makes it far harder to see and to talk about. Couples here tend to come apart not over loud rows but over a quiet feeling building in the other person: I'm always being improved, never quite accepted.
Intimacy with this placement is often closed off at first and unfolds slowly, through trust and through a sense of the body being safe. It matters a great deal to have someone nearby who doesn't rush and doesn't assess. When that kind of space does build, what tends to emerge is a deep loyalty and a capacity to hold a bond going for years — through crises, through illness, through the dull grind of ordinary life. The central inner task in love for Pluto in Virgo is learning not to fix the person beside you, but simply to stay close, even when they're in a bit of a mess. None of this is fixed in stone; it's a pattern worth noticing in yourself, not a script you're bound to follow.