To Run or Not to Run... ?

I have always wanted to run in a marathon. I used to talk to an old friend all the time about running a marathon together. She used to write a calender of training that she wanted to do, and I would always say that we would do one together one day. Well, unfortunately life decided her fate early and we would never get the chance to run a marathon together. I now feel that this is something I should do in her memory. Yet, I fear I will not be able to finish or accomplish it and will let her down. I know if I put my mind to it, I can do it, but I want this to be something for her. I want the charity the money I raise to go to something she would believe in, I want to work hard and train and make a calender and stick to it, because that is what she would have done. I have all these fears built up that by finally deciding the cherish her memory in some way I will mess it up.

So now I must decide, what marathon I should devote my time to... And; "To Run or Not to Run"