thank you for your help. but still I didn't understand about using the 'to'. mmm.... is this sentence similar to this meaning.. like " How does it feel when you won the lottery? ". and any advice would be appreciate in advance.
It tears me up inside to see you. = Seeing you tears me up inside. How does it feel to win the lottery? = How does winning the lottery feel? It's great to meet you at last. = Meeting you at last is great. I was disappointed to hear that. = Hearing that disappointed me. It suits him to believe those lies. = Believing those lies suits him