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Relationships

Mumsnet has not checked the qualifications of anyone posting here. If you need help urgently or expert advice, please see our domestic violence webguide and/or relationships webguide. Many Mumsnetters experiencing domestic abuse have found this thread helpful: Listen up, everybody

My girlfriend wants me to take a lie detector.. should I do it?

78 replies

ThisBrickGuide · 14/08/2025 13:57

We’ve been together almost 2 years, but it’s been on and off lately. She’s always had trust issues that aren’t really about me, but after our last breakup she asked if I’d been speaking to anyone else. I told her honestly that I’d signed up to a dating site for a few days and chatted to some people, nothing more. She ended things, said it was over for good.
A few weeks later, she got back in touch. Now her anxiety is through the roof, she’s constantly looking for reassurance, and she says the only way to “move forward” is if I take a lie detector to prove I told the truth. I’ve told her I think it’s unhealthy and I don’t want to do it, but she keeps pushing.
I do care about her, but this is stressing me out and I’m starting to wonder if this relationship is even worth it. Should I take the test just to shut her up, or is this a big red flag?

OP posts:
rubyslippers · 14/08/2025 13:58

🚩🚩🚩🚩🚩🚩🚩🚩

Myjobisridiculous · 14/08/2025 13:58

She ended it. Keep it ended!

Parksinyork · 14/08/2025 13:58

From your first sentence I think you should wnd the relationship.

Eric1964 · 14/08/2025 14:00

Romantic partners are supposed to make each other happy. Does she do that for you?

TheFlis · 14/08/2025 14:01

End the relationship and recommend she gets therapy for her issues before entering into another relationship.

MrTiddlesTheCat · 14/08/2025 14:05

Absolutely not. She isn't worth the trouble.

ScruffMuffin · 14/08/2025 14:07

I'd be tempted to take it to show you are telling the truth, then finish the relationship because of her behaviour. Maybe that will shut her up AND give her something to think about before she enters another relationship.

cariadlet · 14/08/2025 14:08

As others have said, trust is essential in a relationship. Your girlfriend has problems with trust which aren't to do with you but which do means that she's not ready for a relationship at the moment.

It sounds as if she keeps breaking things off and then you say yes whenever she wants to try again. That doesn't sound good. I agree that you should end the relationship and don't let yourself be persuaded to give it another go at some point in the future.

As an aside, lie detectors are unscientific nonsense. They can't tell whether somebody is lying or telling the truth. All they do is to measure stress responses. The assumption is that certain responses mean that someone is lying. But some practised liars can pass them while someone who is telling the truth but in a stressful situation might fail them.

ChimpanzeeThatMonkeyNews · 14/08/2025 14:09

What’s the point in carrying on. The trust is already shot to bits.

Darragon · 14/08/2025 14:09

Lie detectors don't work. They're bullshit. The only people who believe in them are idiots who miss Jeremy Kyle. Tell your GF to piss off with her mind games and then you go out and find someone worthy of you. This is not a good relationship to be in.

MrsTerryPratchett · 14/08/2025 14:10

I’d ask yourself why you care about her and want to continue the relationship. You probably need to work out what’s going on for you that you would even consider this to be remotely something acceptable.

CalzoneOnLegs · 14/08/2025 14:11

How does one ‘go about’ arranging a polygraph test ? Are there a slew of reputable online companies offering this service ?

Someiremember · 14/08/2025 14:12

What a lovely health thriving relationship this sounds like

momtoboys · 14/08/2025 14:13

What is she, 15? Unless she is, I would give her a wide berth.

InBetweenTheLines · 14/08/2025 14:15

Where would you even go to do one?

Alltheyellowbirds · 14/08/2025 14:15

Darragon · 14/08/2025 14:09

Lie detectors don't work. They're bullshit. The only people who believe in them are idiots who miss Jeremy Kyle. Tell your GF to piss off with her mind games and then you go out and find someone worthy of you. This is not a good relationship to be in.

Edited

All of this.

RosaMundi27 · 14/08/2025 14:16

No amount of lie detectors and reassurance will work. Move forward with your life and hopefully meet someone who is less hard work. She sounds insane tbh.

FluentAquaMoose · 14/08/2025 14:17

TheFlis · 14/08/2025 14:01

End the relationship and recommend she gets therapy for her issues before entering into another relationship.

I completely agree. it does sound like she needs therapy.

TheCurious0range · 14/08/2025 14:17

I would do the test and then end it. But I can be petty

AdoraBell · 14/08/2025 14:21

That seems ridiculous, don’t accept it OP just walk away.

Motcouk · 14/08/2025 14:22

Assume for the moment that a lie detector is 100% accurate and cannot be beaten. Ask yourself if you want her to know the truth and there's your answer.

VimesandhisCardboardBoots · 14/08/2025 14:24

Why are you even wondering if the relationship is worth it? It's not worth it, it's blatantly obvious it's not worth it.

She doesn't trust you. No matter what you do, she's never going to trust you. You've broken up multiple times over this already.

You're just setting yourself up for more punishment here.

TwistedWonder · 14/08/2025 14:28

Where’s Jeremy Kyle when we need him?

amber763 · 14/08/2025 14:28

ScruffMuffin · 14/08/2025 14:07

I'd be tempted to take it to show you are telling the truth, then finish the relationship because of her behaviour. Maybe that will shut her up AND give her something to think about before she enters another relationship.

Id do this

AgentJohnson · 14/08/2025 14:31

You can’t placate an anxious person, anxiety only wants to be fed.