Don't close the door to your own happiness. Don't let bashfulness or shyness stop you from enjoying your well deserved riches.
You are not their therapist. If their behaviour is getting out of control and they aren't willing to change their ways or see how they have contributed to their own problems, you might need to step back and let someone more knowledgeable handle things. If you're out of your depth and don't know what to do next, seek proper advice. You can't allow yourself to become tangled in their mess.
Demonstrating a need for change is only the first step. The next step is to plan for it, help others take ownership of it by allowing them to offer their input, implement it, and evaluate its progress and success.