Its not the lack of will on your part to ' fix' things, its responsibility (ies) that is circumstantial/situational that has cornered you and furthermore foisted on you by .... that is eating you up.
You are caught, trapped - either you reconcile to these state of matters and accept (suggestions here are aplenty, posted here by many) and chug along or be HONEST that you are not interested in all these so-called responsiblities that you unconsciouly lulled yourself into. Of course, you are still responsible wheter its direct/indirect - does not matter.
It is easy to be honest to others, are you being honest with yourself? The way i see it - there is a deep malaise within u - that cannot be ignored! Cos the next job, the house, the wife, the ... won't fix what is lacking within - and even if they do - its no guarantee that will stay!
Wallowing in self-pity and wishful thinking is circular!