Just noticed that you are in UK. So my understanding is that you can get free CBT from the NHS. You might need to wait because there is a waitlist, so the sooner you get on the list, the sooner you will be seen. Maybe you can be fast-tracked given that you have a diagnosed PD and are on medication.

In the US, the most common type of therapy for your PD is called DBT. It is basically CBT with bells and whistles and a little Buddhism. In other words, if you get into CBT, you will get helped. Act as soon as you can - the problems you are describing are treatable and you will feel better and have better relationships after some time spent in CBT.