Are your needs being met in this relationship? Clearly sexually they don’t seem to be, emotionally I would suggest not. Mentally you’re struggling too. What is it you are getting from it? People often fear the end of something that in reality ended a long time before.
I ended up in a completely sexless, affection-free relationship for years. None of my needs were being met aside from ticking the ‘I have a boyfriend’ box. I can’t even say I wasn’t alone because despite spending time together - he stayed with me 5 nights a week towards the end of the relationship - this was because it made it easier for him to get to work without having to set off much earlier. We did nothing of note together, didn’t spend weekends together, only went on one holiday that I arranged, bought and paid for, had to beg him to come to friend’s weddings (again I paid) and the final straw was him not turning up to my family’s home for Christmas when I eventually pulled the plug.
In the end, I lost nothing from ending it but I gained my life back, happiness, peace of mind, self-esteem and my life almost 7 years on bears no resemblance.
Don’t stay in something thinking it will improve if you are not happy because nothing you have seen so far suggests it will.