It is very hard to find out the way by which you can get your ex-boyfriend back. The ideal solution is that to make advancement toward him you will surely get result. It will be useless to throw away your energy, time and emotions on someone who left you. Everybody is free to choose its ways. You should not take it as anxiety and leave it up to nature. You should also choose your best ways for your life. If you really love him, again make an attempt to learn how to get your ex boyfriend back. If you succeeded then you are lucky, if you did not got success then move on with your life. It will comfort you.