It is not possible to be living in illusions and yet not suffer. But it is possible, to not to be conscious of the suffering. Or, to not to know that you are suffering.
One has to be deeply in love with oneself, one has to be deeply sensitive towards oneself to experience the suffering. If you don’t love yourself enough, then you will happily take suffering. And not complain.
After all, suffering is resistance towards pain. If you have no resistance then you have no suffering. Then there will be pain and yet you will not suffer.
Suffering is when you start saying, “No” to pain. When pain is welcome, then there is no suffering.
Read the complete article: Is suffering necessary for awakening?