All of us have inner strength, it is this that we draw on when we placed in situations of absolute crisis. The mere fact that you are posting up your feelings on this board, rather than internalising and letting your emotions fester inside , is a sign of your strength.
Many , many people do not have to courage to even accept that there is something wrong and tell someone else. Look at you, you are stronger than you think...
CBT is very useful in changing the way we think and therefore how be behave, but I'm not sure if it is great at dealing with long term issues, rather it puts you in a more positive mental state to allow you to be able to explore much deeper emotional pain without feeling totally out of control and anxious.
Seek out a good person- centred Rogerian therapist once you have had your short term CBT. I strongly believe personal growth comes from being heard and respected. Be aware that the person centred approach does take time and committment and the therapist /client relationship is all. It is vital to find the right therapist for you. One who values you on an equal level to himself/herself. It is not about advice or teaching you how, rather it is helping you to find your own inner answers to your unique problems in life, and to become aware of patterns and cycles that you may be exhibiting in response to unresolved emotional pain.

I'm happy to listen on messenger if you like. Sometimes all we need is for someone , anyone to hear us.