She continues to tell me she loves me and there was nothing going on and I have nothing to worry about.
I would tell her "Good. Because if you're lying, I will know, and I will NOT live in an open marriage. I'm not 'worried' about it, I just value myself way more than that. Just so we're clear."
And then work on yourself, while you get some good intel in place (and by "intel" I don't mean ASKING her!)