You might notice it happens almost automatically. A message takes a little longer than usual to arrive, and your mind begins to fill in the gaps. “Have I said something wrong?”, “Are they losing interest?”, “Did I come across too much?” Before long, you’re replaying the last conversation, re-reading messages, and trying to work out what might have changed. Even when part of you recognises that nothing significant has actually happened, it can still feel difficult to let go of the thoughts. The uncertainty lingers, and with it, a sense of unease. If this feels familiar, you’re not alone. Many people experience this kind of overthinking in relationships, and while it can feel frustrating, it often makes more sense than it first appears.
When your mind is trying to keep you safe
From a Cognitive Behavioural Therapy (CBT) perspective, overthinking is not just “overreacting” or being overly sensitive. It is often part of a pattern involving thoughts, feelings, and behaviours that have developed over time. It might begin with something small. Someone you care about takes longer than usual to reply. Almost instantly, a thought appears: “Maybe they’re losing interest?” That thought can bring a feeling of anxiety or uncertainty. In response, you might find yourself checking your phone more often, re-reading previous messages, or mentally going over what you said. These responses are not random. They are your mind’s way of trying to make sense of uncertainty and protect you from potential hurt.
The beliefs underneath the overthinking
Often, these moments are not really about the message itself. They can be linked to deeper beliefs that have developed through earlier experiences, such as: “I might be rejected”, “I need to get things right to keep people interested”, “If I don’t stay on top of this, something will go wrong”. These beliefs are not usually conscious. They sit quietly in the background, shaping how situations are interpreted. Hence when something feels even slightly uncertain, your mind tries to fill in the gaps as quickly as possible, often leaning towards the worst-case scenario.
Why it can feel so hard to stop?
Overthinking can feel like it should be something you can simply “switch off”, but it often doesn’t work that way. In many cases, overthinking develops as a strategy. At some point, paying close attention to relationships—reading between the lines, anticipating changes, trying to “get things right”—may have felt necessary or helpful. It may even have reduced the risk of conflict, rejection, or disappointment. So although it now feels exhausting, a part of your mind still treats overthinking as useful. It can feel like if you just think about it a bit more, you’ll find clarity or reassurance. Unfortunately, the opposite often happens. The more you think, the more uncertain things can begin to feel.
The impact on relationships
Over time, overthinking can start to affect how relationships feel. Moments that could feel simple or enjoyable can become loaded with meaning. Small changes can feel significant. You may find yourself feeling more anxious, even in relationships that are otherwise safe or stable. It can also lead to behaviours such as seeking reassurance or, at times, pulling back emotionally to protect yourself from potential disappointment.
A different way of understanding it
What can be helpful is gently shifting the way you see these patterns. Rather than viewing overthinking as a flaw or something that needs to be eliminated, it can be understood as a learnt response—one that is trying, in its own way, to look after you. From a CBT perspective, the aim is not to stop thoughts from appearing, but:
- to begin noticing them differently,
- to pause and recognise: “This is a thought, not necessarily a fact”,
- to become more aware of how certain thoughts influence how you feel and how you respond.
Moving towards something more balanced
With time and support, it is possible to relate to these thoughts in a different way. This might involve: noticing when your mind begins to fill in the gaps gently questioning whether there are alternative explanations reducing behaviours that keep the cycle going, such as constant checking or analysing. This isn’t about ignoring your feelings or forcing yourself to think positively. It’s about developing a more balanced and flexible way of responding.
Final thoughts
If you recognise yourself in this, you might pause and consider: What thoughts tend to show up when I feel uncertain in relationships? What do I fear might happen in those moments? How do I usually respond when those thoughts appear? These questions are not about judging yourself, but about beginning to understand your own patterns a little more clearly. Overthinking in relationships can feel overwhelming, but it is often rooted in understandable experiences and beliefs. With greater awareness, and sometimes with the support of therapy, it becomes possible to step out of these patterns and experience relationships with a greater sense of ease and stability. If this is something you would like to explore further, therapy can offer a supportive space to begin making sense of these experiences at your own pace. If you would like to find out more about working together, you are welcome to get in touch to arrange an initial conversation.