Giving out all of my points, before i delete my account.
how can you know if you are depressed?

Be clinically diagnosed by a doctor.

Explanation:

There are also signs, but they aren't always accurate depictions of your mental health

Different signs become apparent.

Explanation:

You will feel sad, only it will probably feel like a deeper sadness that might feel overwhelming. You could be tired, even with enough sleep, constantly lack of sel-worth or confidence, or lonely, etc.

you should seek treatment when you are seriously thinking of sui.cide, and that can eventually lead to your own death.