There are many good therapies out there for PTSD. Talk with your T next session and discuss your options when you are able to think clearly, without dissociating.

EMDR is an effective therapy, but only one of many. It is contraindicated (not recommended) for people who dissociate a lot, or people who had a lot of traumas in their childhood. These can be hard to address and resolve through EMDR.

This is not a failure on your part. It sounds like there are a lot of things to discuss with your T about the treatment plan, but this is not the end of treatment, since he said he is looking more long-term (this is typical for entrenched traumas and dissociation).

Best of luck.