tw depression ౨ৎ

How do I know if I’m depressed again ? My depression started when I was around 11, and ever since then it never felt like it went away. But some times, especially lately, it was better, I was better and happy a lot. But then again when I’m alone it all comes back to me. It just became a constant mood for me, so how do I know if I’m still depressed, if I got out of it, or if it’s just how I’m designed to be?