Despair is very bad thing.

I was working in a supermarket. İt was very hard job. Finally I couldn't work this job and I resigned. I am unemployed now. I am looking for a job much easy an easier job. Other subject I fall in despair. I fell into despair, because I thought I couldn't learn English.İt seems to me. I watched one hour of LOST, chatted, and read English history. But I can't learn English according to me.I am very sad about that.Maybe I am in depression.

Hi! Despair can't be too bad. :) However, it can be a negative emotion that may lead to depression. You are making progress, and it seems you have a sort of grip on the language anyway, so keep up the good work!

The highlighted sentence might go something like this: I am depressed because I have difficulty learning English.