I suspect your lack of seizing initiative to study -much like my own case- is spearheaded by a lack of any communal push to incentivize you in doing so.
It is only natural, after all, that abstinence from something important [ in this case an intimate external element necessarily demanding some requirements of you for 'base' participation ] will ensue in the unwitting persistence of something insignificant [ anything that isn't *that* thing [ studying ] ]
I lost my ability to clearly speak physically after never having done so for only 8 months straight and to no surprise, with the added combination of neglecting social engagement on my part at all, I lost aspects of cognition like short term memory.
It's meaningless to me, now, anyway, and my efforts to exert some change, as I'm doing now, are probably pointless.
You get used to paradigms you create even if they're damning or maybe, despite them being damning, you still learn to thrive in them?
It's true that I can -and have- reaped motivation from toilets and seats in some of the most demanding of cases rather then colleagues and 'friends', sometimes still doing so today, so most significances warp to becoming insignificant in the progression to a new pattern.
OP if there's any silver lining to my above experience, it's that 'going outside' 'friends' 'similar people' 'depression' 'depersonalization' are eventually swept away by an ocean of numbness which will birth some degree of psychosis; definitely a failsafe triggered at the absence of all things needful.
Someone else or maybe yourself will lead you to a more appropriate path but if all things go wrong, know that it won't be too bad. You'll only be mentally decrypt in some ways and likely insane.