Maybe she would call you if she needs to ,
sometimes its very hard to move forward and
not look back ,there's millions of women out
there in the world .Maybe she understands your are sorry.
I understand how you feel, as many others of us do
but saying sorry is not that important ,trust me
more important you meet someone new in the future.
I never thought i would meet anyone but i did
after an 8 year relationship finished and believe me this one is EVEN better, live your dreams don't hold on to the past, you never know what around the corner for you.
Good Luck be Happy.