I’m not cut out for this

I honestly don’t know how much longer I can go on. Physically my body feels like if wants to give out at any moment breathing feels very labored, I constantly feel nauseous and lightheaded even though nothing is wrong. Mentally everything has gotten so tiresome to deal with the only thing I want to do is waste my time on things that make me forget  about my responsibilities. I really don’t want to deal with this on my own anymore but I dont want to bother people around me because they have their own lives. At this point it feel like it doesn’t matter who cares if I am happy or sad, what does it mean to anyone weather I am in pain or not. No one will know how I feel because they’re not me, in the end it doesnt matter to me because this will all just he a memory. I just don’t feel like doing this anymore. I deeply respect anyone who has the mental fortitude to live the entirety of their lifespan because I honestly can’t.