That's a good question Alisha. I don't think your relationship with your bf contributed to your PTSD, unless he was verbally abusive to you and intentionally isolated you in some way. To come up with the answer to that you need to go over what your relationship really entailed with your therapist. Was it a "controlling relationship" or was it a relationship where you just enjoyed each other and grew together and established a deep trust in each other.

There is no harm in exploring it and discussing it and seeing if you have a good relationship or are you too dependent on each other. If you really respect each other and support each other positively, I don't see anything wrong.

OE