Accept the fact that you might be somewhat more uncomfortable as you go through the change process, but be optimistic. Hold on to the expectation that things will improve. Think of a Band-Aid that you need to remove. Slow and steady can actually be more painful. Quick will also hurt, but it is soon over.
Comfortable misery is slow and steady.
It can be very distressing over time, as it gradually increases in intensity. Action is the best remedy for comfortable misery. It may be temporarily unpleasant as you change, but life can get much better when you are no longer stuck. You can jump out of the frying pan with its slow burn and over the fire. You can leap in to a new opportunity - a new possibility.