You meet a friend while walking on the street, and he/she gives you a hug.
Incontri un amico/un'amica per strada, ti abbraccia.
hug them back harder
I find this acceptable.
i hug back, and ask how he/she is doing.
I would be very happy
I would greet them and ask them how everything was going.
I would hug back.
I would return the hug and see how their day was going.
Unless I hadn't seen that friend in a while, I would find that pretty strange.
Lo abbraccio anch'io.
lo/la abbraccio anche io
Ne sono felice.
ricambio,sorrido e inizio a parlarci.
se lo conosco bene ricambio,sennò faccio capire che forse sta esagerando