Because no one is an island and because everyone, at some time, craves a human connection - maybe even some help? and it's easier to do it here than it is in person ?
I'm sure you do have people who love you and would help if you let them - it's not a weakness, btw, or a burden
If that's simply not something you're going to do right now, that's ok - what about seeing your Dr, or a therapist if you have one?
noone should have to live with depression tears - you deserve better
D