Running away

My life has just ruined itself really..
I only live for one guy and I saw him yesterday the first time since december and he was far more instrested in talking to other girls.
the rest of my life is just emotional..
I think I should run away, I know that might not shove my problems and my mum would freak and properly ground me forever but I really need to get away for awhile.
I feel like im suffocating in my own home.
All I want is that guy, I would do anything to be with him but hes got a girlfriend now..
Please help.