Soooo ...Hmm

I'm a 22 year old dude and as my name says I don't know what to do ...
Ok first of all I met this girl one year ago ..Long story short I believe that she is The ONE ..

Let's call her A 

We were good together for some 5 months ..We had our differences because some other things were in the middle but I was going there (in her town) as much as I could so We can see each other and keep the relationship alive .

Then her best friend ( another girl that I happen to know her and we had something for like 2 days or so ) went in the middle of me and A and screwed everything up ..All the love all that feeling ..Aaand here we are ..After 7 months or so ..Broken inside ...I had 1 more relationship after A and a lot of "fun" with others but I don't know why ...for over a year I can't get over it ..Because it's son UNFAIR something like this to end in a way like that ...

I tried calling her ..But she seems to hate my guts BIG time ..so here is my question :

What to do to at least have the TINY chance with her?? ..She lives far a way ..we don't see each other we don't talk so I don't know what to do...

Thanks In advance ..