No CBT is way more than "think positive". It's actually much much harder. It involves taking a very hard look at the way you approach life and the thought patterns you have that may be keeping you miserable. Everything we see and experience in life goes through the filter of our mind. That filter may need adjustment.

Some people interpret that as "blaming the victim" for having this mindset - BUT you can't change the events that lead to the mindset, nor can you change it unless you accept that you do it.

It's true that we can play an active role in our own misery.

A good CBT therapist will help you understand WHY you think this way and HOW you can change it.