I don't know how much longer I can do this

I feel like I'm drowning in school, in my social life, in all aspects, honestly. This is the third semester I've felt like ending everything, but far from the third time.

I feel like I can't ask for help anymore, that I'd just be a burden again. I don't know what to do. I just can't stop thinking about the belt in my dresser and the beams of my canopy bed, how it might work, but how I'm afraid of the pain.