How to deal with reasonless depression?

Alrighty. So. I’m in highschool. Write that down. I’ve been in love for about 7–8 months, but those feelings went away back at January of February. Long story short, I’m simply feeling bored in life.

I have literally never made an action that I could/should be depressed about, I live the life I want I really have no regrets, I have everything I want, amazing friends, family that supports me, great school, everything someone should/could want.

But I’m just bored. And that’s what strange about it. Shouldn’t depression arise when you have a problem, something you can’t solve etc.? I think that for someone my age, I think way too much about things that really shouldn’t occupy my mind, like death, the meaning of life, and so on.

I mentioned the ‘love’ thing, because, prior to that, things were perfect. No depression, just happiness. I mean, things can never be perfect, but back then, ideas like ‘what’s the meaning of life’ and so on didn’t occupy me. Then, I got in love. And that lasted for much longer then I hoped. Listening to depressive music [back then, not now], being depressed, feeling like sh**, just all bad around.

Most nights involved me, a depressive playlist, no lights in the room, and opened window, just looking out at the sky, thinking. And that went on for hours, literally every night.

Nowadays, that’s all gone. But it’s like, that depression, back then, has, somehow managed to stay in me. The love is gone, but it stayed. Don’t know how, or why. Because of my love failure? Maybe. Don’t know. I honestly don’t feel like that should/could be the problem.

I’m like the guy from 500 Days of Summer, played by Joseph Gordon-Levvit. It’s a story about a guy who believed his life would never be fulfilled until he met the right girl. [so he was pretty depressive about it until he met her] Awesome movie by the way.

Any ideas? Did anyone else go through this? Is this whole mess the hormones fault? I don’t know. I do think about it, every night, even so know, at this hour. [3:17AM in my time zone] I just got up to ask the question, hopefully, get some answers by the time I got up. :) Thanks in advance.