Hello, AmanTravelling! It seems you are assuming an enormous load of responsibility for the feelings and even achievements of your family. By no means do I challenge the reality of your feelings; you feel the way you feel. I am curious, though: as far as you can discern, how did you come to so keenly feel this way about your family members? Have they told you? Did someone else tell you? Were you raised to see yourself responsible for the feelings and success of others?

Of course, there's no need to share anything you don't want here. I personally am skeptical of the possibility of simply reasoning one's way out of depression (hasn't worked for me, at least). Nevertheless, I hope any attempt to think about things will grant you a degree of clarity in your struggle with possible courses of action.