Hey there...
Listen, I'm really sorry for how everything ended up, how we just grew apart, how I broke it off... I miss you as my friend. You were kind, considerate, supporting, and all around a great person, and I feel awful for what I did. I lost something great when I lost you, and I realize how stupid my mistake was. Please, lets be friends once more, that's all I ask. I understand if you'd rather not, so I won't pester, but I wanted to let you know that I care. If I never talk to you again, then have a nice life.