It will not hurt to try.
the lady I am kind of dating now - we first contacted last year and talked a lot, of course she was too chicken to meet. Emails slowed down and I more-less forgot about her but then in November I sent her a message thru the website we met on and we picked back up and have even been out a few times.
Ultimately it will never be anything serious but it just goes to show anything is possible. I mean damn we had almost a year of not communicating.
With my friend, she is not good about staying in contact. that may be the case with your friend.
I would say you can probably expect to have occasional dates with her at least. Don;t expect much more but then you never know. She will probably be glad to hear from you.
Always remember that YOU are the most important person in your world.