Anxiety in relationships

Destiny • Just trying my hardest to avoid being pregnant right now💁
I have been diagnosed with PTSD, severe anxiety, and insomnia due to living in a home with domestic violence when I was younger. My SO really has a hard time leaving me alone during an anxiety attack because he feels he is not helping if he does that, but it's the exact opposite. Has anyone else had experience with a severely anxious SO? And how well did you deal with it?