How to trust

Almost breaking up with my boyfriend last year made me go into a spiral about trusting. I have never trusted anyone really. But nothing could have prepared me for not trusting my bf. When we met I instantly trusted him. Now I know it was probably attachment issues. “The first decent person! I trust them now! “ He’s never lied to me in something thing so serious. At least I think. But he did keep things from me and it just hurt so much. And how do I even know that he did tell me everything. We’ll just by trusting them.. Since then it has made it harder to trust anyone. Making me less vulnerable and just hating conversations with anyone. Even if I like the person. All the progress I thought I had made disappeared. I don’t know how to help our relationship when I’m so heartbroken about everything.