Why am I annoying to everyone?

As a side thing, why does this guy, who I'm only barely friend day with, keep following me everywhere in school, including sitting next to me with the person I have a crush on, fucking killing the entire hour?

On top of that, I'm trying to stay away from relationships and shit, but this girl is amazing and I get nervous around her as it is. I hate this.

what am i supposed to do when the one close friend i have gets as depressed as i get, but shoots down everything i try to do to help him? i cant do anything for him anymore. ive tried everything i can.

Why does life have to be so depressing? especially when you try to help people and they don't even act happy. 😔😔