Hello - I cannot reccommend a therapist personally but until you find one I can wholeheartedly reccomend Co-dependents Anonymous meetings. They are 12 step fellowship meetings and focus very much on releasing negative self beliefs and patterns of behaviour which is very similar to CBT. The meetings are very low cost and there are about 30 or so a week in London. So you can get support as regularly as you need it. There is no need to book meetings are just drop in, it is suggested to try 6 to see if it is right for you and to listen to the similarities and not the differences. There are lots of like minded people and there are meetings just for women too if that feels more comfortable. It offers wonderful support and a program for change for anyone experiencing any kind of emotional difficulties or issues particularly with boundaries, containment or relationships with other people and life.
There is lots of info and a meetings page on their website:
www.coda-uk.org