Why haven’t they replied? Mixed signals, inconsistency, and why it’s hard to let go

I frequently hear how much of a minefield dating can feel for people who are hoping to find a partner - particularly when they’re left wondering, “why haven’t they replied?”, or why communication suddenly becomes inconsistent. One pattern that comes up again and again is being on the receiving end of intermittent or inconsistent contact - something that doesn’t meet your needs, yet feels consuming and surprisingly difficult to walk away from.

Why inconsistency feels so engaging

What can make this feel almost addictive - even if it’s not immediately obvious why - is how we are wired to respond to unpredictability.

We tend to stay more engaged when something is inconsistent, when we don’t quite know where we stand. A message that comes through after silence, a shift back towards closeness after distance, a moment of warmth following withdrawal. It creates anticipation.

From a behavioural perspective, this is known as intermittent reinforcement - where a response is rewarded unpredictably rather than consistently. This pattern is known to strengthen engagement, because the reward isn’t guaranteed.

You can see similar dynamics in other areas of life - social media notifications, WhatsApp groups. We check, we wait, we look for something to land. Not because it’s steady, but because it isn’t.

The role of anticipation and unpredictability

As Dopamine Nation describes, dopamine plays a key role not just in reward, but in anticipation - the sense that something might happen. So it’s not only the moments of contact that hold your attention, but the build-up to them. The “maybe they’ll reply”, “maybe they’ll want to see me again”, the possibility of things moving back towards closeness.

Over time, this can become consuming - sometimes to the point where you lose sight of whether you’re actually interested in this person, or whether the pattern itself is what’s holding your attention.

Why loneliness can make it harder to step away

There’s also a lot to be said for the role of loneliness. From a social and evolutionary perspective, we are wired to seek connection. Loneliness isn’t just a feeling - it’s a signal. Much like hunger or thirst, it reflects a lack of something essential, and moves us towards finding it.

When that signal is active, perception can shift. We become more sensitive to signs of connection, and small cues can start to feel more meaningful. A message, a moment of attention, a slight move back towards closeness - these can carry more weight than they otherwise might.

In this context, the system tends to move towards proximity - not necessarily quality. Which can make it easier to stay with something, even when it isn’t meeting your needs.

The attachment pattern behind mixed signals

There’s also an attachment layer to this. If early experiences of connection have been inconsistent - where closeness was present at times, but not predictable - it can shape how your system responds in relationships later on.

You might find yourself more sensitive to shifts in proximity. Drawn in by closeness, then activated by distance. The movement between the two can start to feel significant in itself. This is often less about the specific person, and more about what your system has learned to expect from connection. Not consciously, but in the background - shaping what feels familiar, what feels meaningful, and what’s hard to step away from.

What begins to change this pattern

What can begin to help loosen our grip and alter our responses is experiencing something different. In a consistent, stable relational environment - where contact is predictable, responses are steady, and there isn’t the same sense of uncertainty - the system has the opportunity to recalibrate.

Over time, this can change what we’re drawn to. The pull towards inconsistency can lessen, and the anticipation around it can lose some of its intensity.

It can also change how we respond. Instead of being pulled into checking, waiting, or trying to make sense of it, there’s often more space to notice it for what it is. What once felt compelling can start to feel unsettling instead. And from there, it becomes easier to recognise when something isn’t meeting your needs - and to step away, rather than stay engaged with the pattern.

Written by Layla Eissa MBACP

Further reading:

Dopamine Nation — Anna Lembke