There is pleasure in suffering and there is no life without suffering. Whether you suffer because you hate what you do or suffer because you love what you do so much, you have to find the pleasure in it. In order to get what you want then you have to deserve what you want. If you want six pack abs then you must go through the intense pain of crunches. If you want to write a book then you must go through the pain and self-doubt of writing. If you want a significant other you must go through the pain of many bad dates.
Everything you want has a price and usually the price is not pleasurable. If you can learn to love or find the good in the suffering then you will see it is manageable. You may even find yourself enjoying a workout because you know the good that will come of it.