This answer might strike a little but pardon me for that in advance. I will try to give one of my friend's experience who went through same .
Currently you are feeling like...
"It's more of a temporary emotion dragging me down, a kind of hopelessness or shame or maybe even self-hatred"
Considering feeling("what's the point ,it's all futile anyways") makes you truly detached from everything at that time. To know whether it's a detached feeling ,check if you feel satisfied by spiritual meditation of ,'Anaapaana' during those temporary emotions/feelings i.e. ....
Yes ,then it's detachment
It's not a temporary emotion but beginning of something else.
1.) If you have no responsibilities ::
It's better to become a full time truth-seeker ,time has come to meditate deeply to get rid of Ignorance because nothing can satisfy you other than spiritual path.
2.) If you have responsibilities ,i.e. few are dependent upon you ::
Stand in front of Mirror & Smash it behind that thick skull that , "I have responsibilities left and there are few (remember the relation) Lives who would become living-Dead without me". If this is the right time , I would have been free from any responsibility. Start meditation at point when that emotion arise and declare that to be a hinderance of life like monkey thoughts of lust , Laziness etc. Wait for right time to come and when that time(of no responsibility) comes , be a full-time truth-seeker.
No it's not a detachment
Then it's called as laziness(प्रमाद) in mind.It can be due to a previous shock_of_life or due to too_much_comfortness in life. In this case ,it's Better to do a monitored meditation retreat for around 1-2 months & do some free-service (सेवा)
before returning back to usual life .It will re-track you in right direction.
That friend of mine is waiting for right time and has already started his spiritual journey partially. Actually ,he is waiting for permission of parents i.e. he wants his parents to remain happy while he seeks for truth.