WHAT SHOULD I DO?!?!? Please help!?

ok well my best friend likes this 1 dude. n she told him she liked him like last year that she liked him. n 2day after she left skool, he told me [[very rudely i might add]] "tell jessica to stop being so obsessive over me and to lay off. its getting rele annoying u no?" shes my best friend n i dont want her 2 get hurt, but at the same time, i wanna let her no wat he said. wat should i do? should i tell her or not?