How can you mend a broken heart?

Many minutes ago..I was thinking of someone..and that someone leads me to think of another someone..yesh..that someone, or rather both "someone"s are some kewl girls...let's put it as someone-1999 and someone-2005..So someone-2005 leads me to think of someone-1999..which made me ponder whether I really know how to love someone..cos that someone-1999 broke up with me for no apparent reason until 2 1/2 yrs later when we patched back, that she informed that she felt I didn't really like her so she broke off with me..cheeseballs..Now someone-2005 behaves abit like someone-1999 and I dun know if history's gonna repeat itself... cheeseballs x 2.... now sometimes, I hope to have a friendly chat with someone-1999 but well, been 4yrs since we broke up (after we patched back) and I hadn't seen her since..perhaps she really hated me to the core when I irritated her so much after we broke up the 2nd time.. cheeseballs x 3.. think am quite a failure.. =/