I don't like his tone and attitude

[GaNine]

First of all. I have so many issues with my relationship with my partner.

It's completely sexless and has been for about 3 years. It began in his side. Eventually so much time has passed without and love making, I can't imagine sex with him again. Even if he was eager tomorrow, it would be so awkward. He can't keep an erection for intercourse and I wondered if he watches porn. We haven't slept together since May. Any time I ask him, he makes excuses.

Aside from the sexlessness, he's a good person outside of the bedroom.

My work was very demanding this week with some extra longer days. It was extremely gruelling. I had to put my phone on silent because there was a morning he kept phoning me. When I finally picked up,he was only phoning for a chat.

Then Wednesday night I fell into bed. I was working all day and I was exhausted. The same thing again on Thursday. All day at work until I got sick. Basically it was days since I saw him or even talked to him on the phone because I was so busy.

I finally managed a call this evening and I didn't like his tone and attitude. He was cross with me. Even though I was genuinely busy and sick and exhausted.

To be honest it sounds like you are both hurt, it's not the case that one person is unreasonable and the other is reasonable, usually both are reasonable in their own way.
I think you need to find a way to get the communication going and get to know each other and then the trust will start to come back.
Until one of you gives up then there's always space to make things better.
Have you considered counselling? Either individual or joint can turn out helpful for breaking out of unhelpful patterns.
Good luck!

Sounds odd OP

You're both not being great to each other, you can't have been so busy as not to even text. You must have stopped to drink or use the toilet. I think the relationship is over.