Venus in a fixed sign (Taurus, Leo, Scorpio, Aquarius) may have trouble getting over people or letting things go. They get very invested and can get stuck on people, it may take them months or years to get over even the smallest crushes. They give people their full hearts so it’s hard when things are over for them to recollect themselves.
Venus in a mutable sign (Gemini, Virgo, Sagittarius, Pisces) may feel that their feelings are very scattered for their crushes, they may have multiple crushes at once or their feelings may not always develop into something more. They like to weigh their options and go with the flow, see what becomes of it.
Venus in a cardinal sign (Aries, Cancer, Libra, Capricorn) like to take the lead, they like to flirt and give signals. Or they may be the opposite and be afraid of seeming too vulnerable so they pull back from their advances to see how it’s going, and then if everything is good, then they won’t pull away again