Help me find this drama please!

All I can remember is the ML and FL were childhood lovers and ML had to go abroad with his family, FL mother forced her to send a letter breaking up with him and he later gets into an accident with his parents and they end up dying, his (uncle i think) adopts him and changes his name so no one would target him, FL ends up becoming an actress and has to do a bunch of stuff to support her family. ML ends up coming back pretending to be someone else and finds her.