Scorpios crave revenge after heartbreak. They won't acknowledge they miss you because they want you to suffer.
To gain revenge for the terrible things you've done, they'll make you think they don't care. It's retribution, so they'll never say they miss you.
Virgos think rationally. Even if they can't stop thinking about you and want to talk to you again, they'll question whether it's sensible.
Some people are better off as memories, so they won't allow their heart get them into trouble again. They'll choose wisely, not emotionally.
Aries are stubborn. They won't confess to themselves that they miss you because it would mean they were wrong to let you go.
Even if they're not happier or better off without you, they'll try to convince themselves. Aries won't tell you even if you're always on their mind.