I'll have been with my girlfriend for a year. in a few short weeks and I love her desperately. There's nothing I wouldn't do for her. But a while ago I discovered some sexually explicit flirting to several guys on her phone and it absolutely devastated me. It was our first and worst argument. My heart was and is still so broken. And it's been months. She's swears she's stopped and that she never did more than flirt. But the worry and doubt is so fucking constant in my head. It's gotten a little better but only slightly. I still lay awake at night wondering if she's talking to somebody else and it kills me. Will it ever stop? Can this still be a successful relationship?