While a break up is a loss, I have suffered other, more permanant losses in my life, and I find that I take a different amount of time to heal from those then others expect as well. I lost someone very important to me at a young age, and to deal with the pain I tried to keep life as normal as I could. I did not succeed in that, and I only managed to shove the pain farther into my being and let it seep out in small amounts. This may have taken longer, but it allowed me to deal with my pain in manageable increments. You can't just wake up one day and decide that it's ok, that it doesn't hurt anymore. On special occasions I still feel the emptyness, but it did get much easier as time passed.
A broken heart is like a broken limb, if you try to use it to quickly rather then let it heal at it's own rate, you will simply make it worse. Allowing myself to heal is all just part of growing my wings.