Is it normal or am becoming crazy?

There is no easy way, but make a commitment NOT to contact her or take her calls until you have no feelings that would betray you. You will eventually realize that you are not better off with someone who lives in another country and doesn't really love you. But not for a while. You will eventually be grateful, but it will take at least a year. Don't let that thought defeat you though. The only way to get through it is one day at a time. Completely shift your focus to a new hobby or exercise. Go to every social activity--church, work, community--whether you want to or not. You will survive. You will be happy. You will be grateful. Good luck!