Born in the Year of Dog. I had a very happy life before November 2012. Suggestion for brtter life?

In November, my boyfriend changed his mind (he is Rabbit born) and found another girl who is in his country. We are in US. We used to live together now we are separated. We still talk and meet sometimes. I m very heart broken. Its very hard for me to concentrate my mind at my work. I m very worried if i forget myself sometimes. I still love him. I tried to avoid him but i can't. I am an educated girl but this breaking up made me very weak. Sometimes feel like to do something really bad though i know that is not good. I don't know what to do. I cry a lot. If i talk or see him i feel i get my energy back for work for a day or so. I am scared that i am dependent on him for my fortune or i don't know what is it. And another thing we are from different country with different religion although he doesn't believe in any GOD. And i believe on everything but when im in bad situation i get doubt on God. Because i feel i was doing right so what happened? I was very loyal to my relation. Never thought we will break up. That's why I m broken and hurt really bad. Do you have any suggestion for me? Plz need a serious help. Do you think he will be back or do i get over on it soon? I want one of these.. Either back or get over so that i can focus on my work. I would be very thankful for your help if you answer. Hope you will answer me and save my life. Thank you.