Depression is like sticking your head into a loaded cannon.

It's been going around alot lately. Depression. The wonderful state of being where you are miserable, everyone else should be too, and you'll be damned if you're gonna suffer through it by yourself.
This notion is retarded.
Depression is an excuse. It is a reason to say "No, I don't want to do that" without seeming like a dick.
Well Im sorry, you still seem like a dick.
Everyone gets depressed occasionally, it's a fact of life. But people who dwell in depression are one of two things:
1. Convinced that they deserve to feel this bad all the time.
2. Obsessed with the attention it provides.

While #1 is a more clear issue of self-esteem, #2 is a issue of ego. People who feel they deserve to feel like crap have some intense belief that somewhere they did something so horrible that it demands that they never be happy again. I wish those people the best, I hope the come to terms with their actions, but in the long run, they will be fine.
People with the second kind of depression think that as long as they wallow in suffering, people will love and support them. In the short-term this is true, but it also slowly forces everyone away from you. So soon you have to find new friends, have a new horrific event occur to you, and start the process over.

Both situations are pointless. The people who feel they deserve to suffer, generally don't deserve it, the people who want the attention, end up spending all of their time getting more attention.

It's ok to be depressed. It's just not ok to dwell in it for too long. If you spend more than a week depressed about the same issue, it's time to rethink this plan.

The issue is clearly not changing, and feeling depressed obviously is having no noticable effect.
Find a new plan, and move on.

As a former type 1 depression suffer, I can tell you that being depressed did absolutely nothing for me. I felt like crap, but my situation remained the same. Because I wasn't actually doing anything about it. I used to be depressed when I was single, and thusly removed myself from the dating pool because who wants to date the chronically depressed guy?

Honestly, try anything, and I mean anything to cheer yourself up out of the funk. My personal favorite is simply thinking about one of my favorite songs and humming along in my head. No one knows why I am smiling and bobbing my head, but they are sure that in this moment, I am happy.
And I am happy in this moment.
Life isn't about finding eternal happiness.
Life is about putting as many breaks in the misery as possible.
If playing with puppies makes you joyful, go visit a pet shop.
You will feel better for a little while, your problems will still be there when you get back, but atleast you'll be facing them with a more hopeful outlook.

Just don't wallow in your suffering like a fucking pig in mud. It's unattractive and uninteresting, and you'll soon find yourself alone, and covered in mud.