My insecurities and trust issues are ruining my relationship?

How do I overcome it? Its not so much that I don't trust him but I catch myself questioning a lot of things. For example I see old pictures of ex's on his phone and I question him about it why are they there? It's not like he's keeping them and looking at them and reminiscing. He said he doesn't have time or patience to go one by one and deleting them. He said I'm more then welcome to go through them and delete them myself. I just question a lot of things and he gets upset because he feels like I don't trust him. It almost caused us to break up because it's not the first time I did it.
My insecurities and trust issues are ruining my relationship?
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