And what if you knew that your life was destined to be short? What then? Loneliness is a small price to pay compared to what could happen to the people you care for. I am not worried about my own happiness and I am not afraid of losing anyone. [Partially a lie there as well.] As I stated before it's attachment and I'd prefer to keep it to a minimum to spare others pain.
That also depends on your definition of strength. It comes in many varying forms.
Yes. While I realize what I've stated is mostly personal bias and experience I hope that it helped you somewhat.