"The heart wants what the heart wants."
If desire is the root of all suffering, why do we desire at all? If to crave is to starve, why do we crave at all? If to want is to not have, and to not have is to want, then what is a man to do? Some would say that suffering is an inherent part of the human condition i.e to be alive and know it is to suffer, but I digress. Truth is that the human condition is all-encompassing. It is not a line on the spectrum, it is the spectrum. It includes so much more than suffering.
Suffering and desire correlate, they may not be the two sides of the same coin but they could be two coins of the same chest. And, both of them are needed in sufficient amounts to better ourselves. Things start to go wrong when people want too much, and people always want too much. A man, who constantly wants more than what he has, suffers immensely. When you go through life looking at what other people have in their hands, you never know what you have in yours. An insatiable man is an ignorant man. Gratitude eludes him. He suffers, endlessly.
Does this mean that our wants and wishes are the singular cause of all our suffering? Well, obviously not. To better understand the correlation between our desires and suffering, we must first understand what suffering is. Long answer short, suffering is the antithesis of joy. A man who has never felt joy will never suffer. However, this does not mean that one has to be anhedonic in order to avoid suffering. We simply need to understand that suffering isn't something bad — it has no inherent moral value. The Stoics regarded it as 'adiaphora,' meaning indifferent, they argued that since we can't completely govern external indifferents like pain & pleasure, we should not overvalue them when assessing happiness or morality, which is exactly what we do (we overvalue them). This means that you and I don't need to deny ourselves the simple pleasures of life in order to avoid suffering. A little desire with a little suffering is okay, it won't kill you.
A lot of it might tho.