I think it is safe to say that problems are evolutionary drivers and crisis often proceeds a big change. It's at the moment of the great discomfort we often find a new way that helps us grow.
In 2012 when I hit the rock bottom with my emotional state, there was a moment when I felt that "enough is enough" and that it was the time to try something that I subconsciously knew could help. I needed to start creating a stronger body because the strong spirit can only reside in a strong house.
I've been a professional athlete for over a decade back in Russia, but with the move, daily problems, new life, and new experiences occupied my mind and I stopped exercising on a regular basis.
I started going to the gym next to my house. I was training religiously, trying different techniques and programs. I was training 4-6 hours on some days (that's not a recommendation). Every single day I was showing up and training like my life depended on it because in some sense of it, it did. When I felt like crying, I pushed myself harder, I ran faster and lifted heavier. Within several weeks I noticed my body starting to change, depression started to ease, problems were not that tragic and that future was actually more exciting than what I originally thought.
Years of unhealthy habits allowed me to forget that overcoming difficulties in a physical state ALWAYS translates into a stronger spirit and clearer mind. Fitness showed me my strengths and presented me with the opportunity to extend my hand to others, to prove them that they are stronger than they think they are.
To be the "saving grace" fitness has to become a lifestyle. It has to be something that you crave. You can only crave it when you've gotten the taste of what it can do for you. Give yourself a chance to feel the positive effects of healthy lifestyle and regular exercise. Give it a little time to show you how strong you are. Trust the process - nothing happens overnight! I assure you, the reward is well worth it! :)
Stay positive and keep grinding!