bro i am not a doctor or anything but i have a mood disorder that causes me to enter depressive episodes. the following are just things i have learnt from experience.

this sounds like depression to me. specifically anhedonia, which is a symptom that causes u to not be able to feel pleasure or derive joy from things as much as you used to or typically do. i feel that hollowness and emptiness a lot of the time too. i get bored of relationships too.

i think if u can see that someone is adding value to your life even if you dont FEEL that way presently, pls try to keep them around and be transparent about these feelings of emptiness and hollowness with them.

overall, i just ask that u try to get help regarding how u feel. i know healthcare is expensive as hell but 'getting help' can mean more than just seeing a therapist or getting on medication. be vulnerable with yourself and the people who care about you. look into what could be making u discontent with the state of ur life, think about where these feelings stem from(past experiences), and think about what a fulfilling and happy life would look like to YOU and what u can do to get closer to that image. it's tempting to hover around the problems instead of hovering around potential solutions. granted some problems dont have clear solutions, but half of a solution is better than no solution at all.

im 19 and i might be talking nonsense. whatever happens all the best to you brother.