Regardless of how it ended, you need a clear and concise plan to win his love back if you still care about him.
The reality is that far too many women are willing to "let love go" rather than pursue it.
Of course, if you take the wrong approach to this issue you will end up in a near irreparable situation which is exactly what you don't want.
Although men end relationships for many reasons, getting them back is a fairly straightforward process.
This is because men are quite predictable when it comes to how they deal with their emotions.
Though there are exceptions, the majority of men will be angry directly following a breakup.
They ended the relationship for a reason and any attempts by you to win his love back by showing him how much you care will be met with permanent rejection in his eyes.
During this angry phase it is best for you to keep your distance to avoid any awkward moments which will hurt your future attempts at reconciliation.
I would advise that you stay active and show him that just because you are no longer together your life is not over.
This will make you appear a challenge to him, something all men love.
Get to know his friends well, as they will not only be sources of information but also potential sources of jealousy for him which will make him the desperate one.
Another very important tip in winning him back is to be yourself.
Obviously there was a reason he liked you in the first place, otherwise there would have been no relationship.
The reality is that though he may act different outwardly, whatever attracted him in the first place will often attract him again.
If you try to "change" yourself too much after a breakup he will once again read it as you being "desperate" to win him back, which you should never appear to be.
You need to be the same person he initially fell in love with.