The thought "I cant take this anymore" is a turning point, whether you decide to let it weigh you down or use it to propel you to dizzying heights. You just wont remain the same once this thought sinks in.
There are really only two ways to go from here. Up or down. You cant even stay where you are forever, because life will change and drag you along. On all days, down will always look like the easier option. Because falling down takes no effort.