How to help my stepson with abandonment issues?

I just wish that he can see it too, that nobody is leaving and that he is loved

Thank you! He is actually currently at a child therapist for the first time with his dad. I just hope he feels comfortable enough to open up and talk. I wanted to take him so badly because I see what he is doing with the people pleasing; I was the same way for such a long time. His sister is an adult so and I met her when she was in her teens. She was old enough and in tune enough that one night when her dad and I had a big fight ( he was black out drunk and a scary scary person) she actually told me about her issues. She said to me “I understand if you have to leave but please don’t because I have abandonment issues”. I told her that no matter what, she is my daughter and will be forever. After that we became really close. She calls me for advice and just to talk all of the time.

reminding him constantly that he is loved & that you'll always be sticking around is very important. i'm glad you're doing that. his trauma may be causing him to feel like he needs to people-please. that is a big symptom of childhood trauma. honestly, i would consider taking him to see a child counselor. telling the counselor about your concerns beforehand could help them identify his struggles & help him work through them on a level he can understand. :) it breaks my heart to hear a child so young went through so much. i really hope he can recover from it soon. best wishes ❤️❤️❤️