Ultimately, some people will reach this point. I think it comes down to if you actually want help or not. Some are just so forlorn that they have no faith in recovery entirely. That's not to say that mindset won't change later on, but I usually don't like to think of a moment where I'm like, "yes I'm good now"
Maybe I'm just twisted, hurt, or bitter but honestly I would rather ctb at a high point rather than a low point in my life just out of spite for the mentality that it gets better.
Diagnosis not really needed atm, since regardless u have pretty bad attachment issues. Might help if you want meds to numb or distract ur brain but that's about it.
And ya, being largely isolated can def make the few relationships u have feel exaggerated in importance. It is what it is, and I'm sorry for your suffering. Relationships really are already emotionally distressing even for those who aren't overly attached.