Hey there, wachiki92! Nice to meet you, first of all. Sorry to hear that you're having a rough time. Have you considered the possibility that you might not actually have a depression disorder? Generally most of the depression types requires persistent symptoms lasting more than two weeks. You could be just going through a bad period. If you believe you are suffering from depression though, i offer you to make a research upon the subject and try to get to know about your condition in more detail.

Depression is not treated so quickly in many cases, but it is definitely treatable when the right approachment is used. You can cope with it with patience, time and further help. I'm dealing with depression too and it has not been easy; however i can see that light at the end of tunnel. May you find your sunlight too.

Depression or not, i suggest you to consult a professional either way. Opening up to a trusted one and talking about how you've been feeling lately is a good choice too. Monitoring yourself closely and figuring out what doesn't feels right is a big step. And remember, there's no need to be ashamed about what you're going through. As soon as you accept your issues, you'd be more confident with who you are.

When dealing with your co worker, a positive attitude might help you not to get irritated. Don't forget that he's trying to reach you, so approaching him with gratitude would please both him and you.

Good luck and don't hesitate to seek for help when the times are bad. We are here to support you.