Am I depressed?

Before I say anything else, I’m only posting this because I am scared to say anything to my family/see a medical professional about this.

The tiniest things trigger a bad mood that lasts days.

I constantly feel like I’m an inconvenience to everyone, and everyone is just pretending to like me (even my friends and family) so I feel better about myself when in reality they couldn’t care less about my wellbeing.

I isolate myself a lot (because of that).

My self confidence fluctuates like crazy.

I find that there’s a fine line between wanting to talk to people about how I feel and bothering them with my chronic sadness.

I stare at walls/ceilings/tiny details of my surroundings for long periods of time and it’s like my brain turns off.

I overthink everything people say or do.

I get really anxious about very small things to the point where I can’t sit still.

I get nervous about the most simple interactions with people.

Can anyone recommend anything to help?