I Lost a Friend

She and I met unexpectedly at where I was working.She was transferred from her place to mine due to a shortage of manpower and when we talked the first time,I could feel it in me that we had chemistry because we instantly clicked.It was the greatest feeling I had ever felt in such a long time because for the longest time,I felt like I could not connect with the other colleagues that I was working with and it made me feel really alone and sad.I should probably mention that I have crippling depression and anxiety as well so maybe that could have maybe been a factor as to why I found it difficult to connect with others? Anyway...so for the next couple of weeks,we talked about stuff and things that interests us like movies,food etc etc and it made me really happy:) i felt like i had found a potential friend.There was a time as well when she was feeling down,and I stayed by her side and consoled her.Things were going so well I thought until one day,she "left".It happened so suddenly and I didn't know why or how.She got transferred back to her old workplace.And it took me a while to realize that what happened really crushed me emotionally because i kept convincing myself that she was happy where she was now(in fact she is).But i guess I'm hurt because I never got a chance to say anything before she left nor did she say anything when she left.I knew where she was working so there were a few times before that I'd popped by to say hi and we'd exchange a few words and that was it.We'd be like strangers again.I don't understand.Did the times that we shared,though short it may be,not mean anything to her?Did I do something wrong?Was I not worthy of being her friend?Was I not good enough?Did I not do enough? Till today,these questions and memories are constantly haunting me.A part of me will always paint a beautiful,imaginary picture of what I thought could have been if maybe I had done something more.I need to learn to let go but I can't...