Im not able to move ..

She is really best and honest person ive ever met
We were together for long time but she never had any problem with me but somwhere my few things she never liked but she thought im happy in being myself so she never told me anything even though its hurting her but in January she told me she want space and told
Me many things i did wrong so after that time i realised many things and tried to contact her told her i will
Change every thing every little thing but she said she already moved pn long ago
But i just cant accept this even after 7,8 months i think about her every minute im living with so much guilt , greif