Oh, sorry.. LOL! 
What I was trying to say was, how does one use CBT with regards to having insecurity and feeling not good enough to date. Due to one having an anxiety issue (with resulting depressive emotions at times)??
I hope this is clearer!
Another one is being concerned about being/going crazy, or losing it? In general, as well as saying, when trying to go somewhere like a job.
Two issues, I hope you can show me how CBT would work for. 
With anxiety and resulting depression symptoms, you need to ask yourself what specific automatic thoughts are you having that causes the depression? So find the Activator first, which would be what event triggered your anxiety? Then write down the Beliefs about this anxiety, such as "I'm not good enough" or "I'm a failure" (those are just examples, you need to think about what your automatic thoughts are). Then, what are the consequences of these automatic thoughts? Is the consequence depression? Does it cause a maladaptive behavior? Dispute the automatic thoughts by thinking about why you think you aren't good enough...it's hard for me to think of an example for this because I don't know the specific reason why you believe you aren't good enough. Finally, think of what the outcome would be if you believed the disputing, more realistic thought.
For fear of going crazy, again I don't know your specific beliefs but I'll try to make up an example:
Activator- Going to work
Belief- I will lose my mind if I leave the house and go to work
Consequence- I don't go to work -or- I quit my job
Disputing thought- Leaving the house may cause me a lot of initial anxiety, but I probably won't go crazy because I have never gone crazy after leaving the house before
Consequence- I am able to go to work -or- I am able to look for a job
That is just a rough example...you need to think of your own specific automatic thoughts and consequences of the irrational beliefs. I hope this helped.