I hv gone through somewhat of a similar stage in life when I was in high school, so I can definitely tell you this with full trust , it will get better buddy , I know it feels like you might be drowning but stay afloat for the time being , you will be out of this, in the meanwhile the best thing i can suggest you is to get off social media sites like vlr, instgram, tiktok, twitter , reddit, etc etc , cause trust me these sites only make you feel like shit and not bring anything real to ur life, also if u don't have any important stuff in uni in the very near future just take a small break and visit your parents and tell them you don't feel good in life( this generally works better if ur asian cause asian parents tho they are harsh, at the end of the day will still help you out, you just need to put it out in the right way, tho it could work with other parents as well depending on how they are, but i suggest still try it) , losing interest in habits might not be necessarily due to this feeling but it could also be you be moving out of them and it's fine cause you develop new ones, put yourself more in real life among people who don't make you feel like shit and among those people you can enjoy being with , having pure fun , things may seem impossible to u rn but take them one at a time , make a goal in life if u currently don't have any and make sure the goal you have is something u want to achieve and not something like I want to earn money cause if ur feeling shit money won't do much. Also most importantly , just write down stuff bro the things that you feel or even record them whatever suits u, and try asking yourself the basic questions like since when are you feeling this , why are you feeling this. Meaning just try to figure the root cause if possible , another important thing is identifying the bad stuff from ur life and eliminating them like watching porn, scrolling endlessly etc etc , obviously it won't be easy to get rid of all things easily but Start trying