Advice : Is Someone f.uckin My Girfriend ?

It’s a long distance relationship, when i saw her today she looks like a typical runz girl , she couldn’t maintain eye contact with me, her composure was terrible she was just behaving how girls do when they’ve started having s’ex, i just noticed some changes in
her behaviour .
She didn’t even stay for long, she was a virgin before she left for her private school, and she doesn’t even sends me now ..
My People has someone started f.ucking my beloveth What more signs can i look out for? i really love her ..