My boyfriend ex reached out to him romantically, I thinking about breaking up with him. should I worry?

He was with her for three years off and on. She reached out asking how he felt about her. They broke up a year ago He says he doesn’t have feelings. He says he likes me but I don’t trust this. And I’m thinking about breaking this off
My boyfriend ex reached out to him romantically, I thinking about breaking up with him. should I worry?
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