Should I forget my girlfriend?

One should not take virtual friends as real friends. We are hearing about many cyber crimes and many people are losing their money because of these virtual friendships only.
At least in your case, she has not cheated on you. Probably she might have gotten cheated by somebody else and hence she might have stopped virtual chatting.
Many people try to make friends online and try to extract money from other people. Some innocent people will get victimised.
You may be having many other real friends. Always when we meet our friends only, we can understand what type of people they are. The face is the index of the mind. So my sincere advice to you is to forget about that girlfriend with whom you are virtually chatting and try to make some good real friends who can help you when you are in need. I wish you all the best.

Since when people started to live in the virtual worlds they started to make virtual friends. Nowadays, many people are making virtual friends and getting married. Hence, cybercrime is on increase. As per my suggestion, you should away from such kind of friendship. Try to make good and real friends. If you meet face to face then you will notice good habits and bad habits of friends. Virtual is virtual. Whether living or not living. You should forget her. If she is not interested in chatting then you should also change your mindset and spent the most time on your work. It is better to live without friends instead of having cheater friends. On the other hand, maybe she may have cheated by others so she is showing disinterest in you. One thing always keeps in mind, self-dependency is the identity of the strongest person. Whether physically or emotionally.

It is quite disturbing that you have lost your girlfriend with whom you have had intense passion and there was rather an emotional bond between you and the said girl. However, with the time, responses have dropped drastically which might be due to the different reasons - not known to you.
In this connection, I would like to add my own comments and it could prove to be worthwhile if you could anticipate the her real problem with which she might be suffering currently. There could be one of such possibilities hindering her from making contact with you and my guess in this regard is indicated below-
1) Since you have explained that both of you have had the relationship of pure love and that infatuation satisfied you both but ultimately this relationship was aborted. Frankly such relationships of ideal love are not sustainable in this selfish world.
2) She never indicated that she is interested to have any marriage alliance with you.
3) In the present scenario, she could be preoccupied with some activities not known to you but one thing is sure, she is no more interested to share her feelings currently with you.
4) Hence it is better to forget the entire episode giving a space in this relationship. May be she is on the look out for a more meaningful relationship but that is beyond your comprehension.
5) Such infatuations never last for long. Be practical and think of the ways which could provide you real happiness with the fulfilment of your constructive objectives.