I 19M overthink a lot when my girlfriend 19F spends time with a male friend and I want help managing it better
I 19M have been with my girlfriend 19F for 4 years.
Last year she became close friends with a guy from school, I will call him X. At first it made me uncomfortable and we talked about it. Recently they started talking a lot again and have become close again. They text often and she has told me they will probably hang out again too.
I trust her and she has never actually given me a reason not to. She also says if they hang out she will usually try to include other people so I feel more comfortable. She has been understanding about my feelings even if we disagree sometimes.
The problem is more with me overthinking everything whenever they are together or talking a lot. My brain keeps imagining scenarios and I end up checking my phone constantly, feeling anxious, comparing myself to him, or getting quiet and distant with her afterwards even when nothing actually happened.
I do not want to become controlling or make her feel guilty for having friends. I also do not want my anxiety to damage the relationship. I want to learn how to stay calm and stop spiraling when situations like this happen.
For people who have dealt with jealousy, insecurity, or overthinking in relationships, what actually helped you calm your thoughts and stop obsessing over situations like this in the moment?
Length of relationship: 4 years
TLDR: My girlfriend has become close again with a male friend and even though I trust her, I overthink a lot whenever they talk or spend time together. Looking for advice from people who learned how to manage jealousy/anxiety in a healthy way.