Perseverance, stubborn, or selfish?

I guess you can say I’m all three. Although, given
the situation perseverance is applied to; I believe
that all three are one in the same.

per·se·vere
ˌpərsəˈvir/
verb
continue in a course of action even in the face of difficulty or with little or no prospect of success.

The point in perseverance is to continue striving towards a goal no matter how hard it is, even if
it looks like you may not pull it off…
and that sucks… I’m no longer one to give up so easily… but, how long does one persevere
whilst living every day with a dwindling hope? Whilst losing ones self a little bit more each day?
Being in this pain, and instead of rolling over… trying to do something about it… one-sidedly…
I feel unworthy of even basic respect… i don’t deserve the basics of communications…
I don’t deserve to even voice my feelings or thoughts… nothing i say or do matters… basically..
Utter Disdain.

Where is the breaking point?
I personally don’t know…
but I feel I’m coming close…