How do I stop overthinking everything? My girlfriend has told me multiple times that she would never cheat but I get that thought in the back of my mind that what if she's lying because I've had sum fucked exs in the past and now I wanna know what she's doing every minute of everyday who's she's texting and allat but if I continue to do this she's gonna leave me for sure and I don't want that to happen I just need advice