Can I do anything to save my relationship?

I had an argument with my boyfriend, he was honest but I kept asking him over and over again and made him feel like I didn’t believe him. He said he wanted to end the relationship because of this. I know he is a trustworthy person but I have serious trust issues from childhood. And I’m trying to overcome it. I never reflected this to him except for this topic. He had a lot of bad things happen to him in his previous relationship because of trust issues (she was very very toxic). He said "I'm afraid of turning into a toxic relationship, trust issue is a big problem and it can happen again at any moment." The respect between us never broke down but I'm sad that he gave up so quickly. I've self awareness, I'm trying to heal and I'd expect him to hold my hand during this process instead of giving up so quickly. What should I do in this situation? Sorry for my English by the way I'm not a native speaker

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Can I do anything to save my relationship?
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