Trauma

I’ve recently gotten into a new relationship and everything was fine for the first 3 months but recently I noticed some behavior changes in my boyfriend. Like he doesn’t do the little things he does anymore for me, which makes me anxious and overthink a lot if I did something. When I opened up about this to him he explained that the environment he has at his home is recently becoming really toxic and he feels lost and doesn’t know what to do. I understand him completely and why this would make him change but I have a hard time trusting him even though he reassures me that he still loves me and he’s not going anywhere.

I feel that my trauma/trust issues from my previous relationship is affecting how I can trust my current boyfriend, because that previous relationship made me question and extremely anxious whenever we had a rough patch, his solution was to end the relationship but I kept saying that we should be fighting for it and this made me anxious and overthink if previous ex still loved me because even though I knew that he didn’t loved me anymore, he still kept the relationship going.

I’m afraid that this rough patch that me and my current boyfriend have now will also lead to that, but I know that they’re completely different people, and I still don’t know why I can’t trust his reassurance.