So, I (23F) have been dating fit my bf (M36) for little over six months now so things are new. For backround I have been in DBT and it ended in March. This is the first time since a was 12 when I'm not in some mental health service or in therapy.

So, I found this amazing guy who has two kids ( 11 and 12 year old). The kids are amazing too and I like them and we all get along well. The issue is that after DBT ended I have had tremendous amounts of anxiety specifially related family dynamics. The attachment I am forming with the kids triggers childhood trauma and emotions. I am having weird flashbacks and emotional states (I have been diagnosed with PTSD as well). The flashbacks aren't always very intense, I can function and be in imteraction with people but it's creatin anxiety. 

The other thing is that I'm having a hard time with the fact that my bf has kids with other women. I know it's kinda weird because I knew what I was going into but I couldn't imagine these kinds of feelings exist when I started dating him. The whole thing didn't bother me t all. The Hard part is that he will always share two important parts of his life with someone else and not with me (not in the same se se as with the kids mother). Also I get a bit sad when I see them being affectionate with each other and I'm new in this dynamic so naturally I'm not that physically affectionate with the kids. Although I understand that things are new and it takes time to build a bond and get closer with them. 

So, does anyone have some insight how I should look this situation or does some has peer support? I posted this on here because my feelings on abandonment are very high up. I feel anxiety and shame every day very intensly. I feel like I have done something wrong even if I know I haven't. I sometimes feel that they all hate me, kids especially (even if they haven't said or done anything that indicates that) and they don't want me around.

Does someone has any advice how to process with this?