BlueLagoon, welcome to Psych Central. Sorry to hear you are feeling unsettled about what to do in this relationship that hit some roadblocks.
It is difficult to reach out when the other person ended the relationship. Is it worth opening up those wounds again. Only you know. If you are working with a therapist on this, then this would be a topic for a session.
There is no easy advice. If this is your first major breakup, it has all the pain and disappointment that a divorce or a death has. But death is a cleaner break. A break up offers hope that things will get back again.
One thing to ask is what has changed since the breakup.
If nothing has changed hoping to get back together seems a vain hope. Does your girlfriend have your email and phone? Has she tried to contact you since the breakup? Maybe that is a message she is sending.
I know it is not the message you want to hear, and it isn't that easy just to say it is over. This is something that can heal over time. But the greater the pain, the longer it may take to heal.
Doing the healing alone is difficult. Finding a therapist might be a positive relationship to begin to understand what went wrong in the relationship you were in. Then starting a new relationship from a new point is possible.
Possible forums to explore, relationships and communication and many others
http://forums.psychcentral.com