My hubby and I are trying to work things out. He said I need to work on my trust issues which I know…

My hubby and I are trying to work things out. He said I need to work on my trust issues which I know I do. But it's hard when he broke up with me in august just all of a sudden just said we were done and then we got back together the next day after we talk it out and I look at his phone and he was texting his ex and on a dating app. He's ex was just a fuck buddy not a real relationship. So I flipped out. I know I've gave him some reason to not trust me and I know that but we worked all that out. Ya I get super jealous and that's part of the problem too. But one of his friends at work just happens to be a girl and she told him that they probably shouldn't be walking out together because she don't want me to get the wrong idea? If y'all are just friends how would I get the wrong idea.