I am trying to find a word to represent feeling happy (but in a more content and satisfied way rather than elated) combined with a sense of security and stability in one's life.
After many ups and downs, she finally found a steady job and settled into a comfortable long-term rental. Years of anxiety and stress had taken its toll, but she could now relax and feel _______. Things had worked out in the end.
The best I could come up with was content, but it feels a bit dry and doesn't really capture the depth of feeling.