Que significa cuando una muchacha se despide de ti dándote la mano pero te sostiene la mano por muchos segundos sin soltarla?

maybe....................

Thanks for your reply Mishko. I think she was happy to meet me. She held my hand for a long time and she told me that she was very happy to meet me but I haven't heard from her yet. I was with other three people visiting their office. Are you American? Feel free to write me in English or Spanish. Feel free to use your native language when you answer me.

What does it mean when a girl says goodbye to you shaking hands but holds your hand for many seconds without letting go?

It may mean she likes you

But I would look for other clues first before jumping to conclusions

Puede significar que le gustas

Pero primero buscaría otras pistas antes de llegar a conclusiones