Should I stay with my partner? Please help

[Randomusername65]

I've been with my partner for 12+ years (lesbian relationship) and lately I'm feeling really lost and not sure what to do. I'll try not to miss anything out so I don't drip feed. We got together when we were quite young and was great at the beginning but lately I feel like I'm checking out. I've been depressed/anxious so don't know if that's contributing but I never feel like sex anymore. We had a massive argument this morning and my partner said maybe we should split up but after about an hour said she didn't mean it she was just angry. I'm worried we are growing apart and on 2 different wavelengths but at the same time I love her and we are like best friends. I'm out of work at the moment with mental health issues so not sure I'm struggling to juggle that ontop of this and that's why I feel so lost?
My partner is genuinely great in so many ways, I probably haven't painted the best picture but she would literally do anything for me. The main thing that concerns me is she's prone to lying over silly things and she has got a victim complex sometimes even if she's clearly in the wrong. I found out a few months ago she was following another woman online with a way better body than me who basically danced in a thong. I don't think I handled it the best but she lied to my face about it for about 2 hours. Apart from this she's usually so kind and thoughful. So I'm really 50/50 on this.
Sorry if this is all jumbled, my thoughts are everywhere. I'd be really grateful for any help in coming to a decision.
Thank you so much.

That must be tough. Do you think your depression amd anxiety has been brought on by the relationship? Or is there another reason? Depression can cloud our judgement but its not nice to hear that the peeson we love wants to give up on us ine minute, but then retract a moment later. That definitely would give me anxiety. If you are checking out, why is that?

Can you see you two together in 5 years? Or two? Do you two generally communicate well? Or is there a lack of?

Thank you for replying @Grandmasword
I think it's a combination of things, I have issues with past trauma from childhood which I'm starting therapy for soon.
I highly suspect I'm autistic, I have done all the online tests so will going to my GP to ask if they can Make steps to diagnose me.
The uncertainty over the relationship is adding to it. I have issues making decisions and I'd like to sort things out before finding a new job.
I struggle to see the future, it's kind of blank at the moment to be honest.
We do usually communicate well.
Not sure why I'm checking out, I just feel a disconnect which could be because of depression. I have got trust issues as well.

You shouldn't make a romantic relationship your only and main priority; it sounds like your housing rests on being in this relationship, which is wrong. Do you have family you can stay with until you work out what you're truly feeling?

No, I don't speak to my mum and my dad lives in a 1 bedroom bungalow. I'm not that close to my relatives. My mum has a personality disorder and most of the family are her flying monkeys. I can't think of anyone who I could ask for help. I have some savings to get me by but I'm not sure it would go very far if I got my own place. If I decided to leave I'd register for council property but this why I'm in here as I'm not sure what to do.

This is why I'm here*

Hi op yes depression and anxiety can definitely make you unhappy in a relationship its hard to forsee but are you really generally happy does your partner make you happy I know from personal experience that when I was depressed and anxious I felt my partner made me happy but after therapy and talking about my childhood turmoil I relished my true feelings therapy helped me I really hope it can help you