why he left when we were still love him??

my friends ask me this: 

"why my boyfriend left although i didn't do anything to him, 

i'm sincere, i'm loyal to him....i don't know what i did wrong....but he just left.....

and i can't have him back....he just dont want to be with me anymore....

what should i do?? i can't live without him, he's my strength to live.....he's my soul and all 

that i ever wanted,,,he's the one  that i want for eternity....

i wont ask much....but i want him back......why he left????"

i gave her many tips to fight 4 her love back but all didn't work out...

so i ended up with one conclusion of why he left her

the answer is:

because, he's a bullshit!!