Am I supposed to feel bad for saying the truth

Well from his perspective he's probably just embarrassed that you've brought it up. But realistically why wouldn't you? He needs to make a dentist appointment and see if it's linked to tonsil stones, poor dental hygiene, or a rotten tooth tbh. And frankly if you can smell it, so can others around him.

Get rid of this minger. Fucking gross.

Bad oral hygiene is an absolute deal breaker. I wouldn't even have got as far as sex 🤮

Gross
Dump him

Is it bad oral hygiene or could there be an underlying cause?

Could it be gum disease? Bad breath is a symptom. Are his gums inflamed or bleed when he brushes his teeth?

I was dumped many years ago for having bad breath and it turns out I had gum disease. Never knew as I'd always brushed twice a day and flossed, albeit not brilliantly.

It was hurtful because he never even gave me a chance to rectify the issue, however I see you have told your partner multiple times so there isn't a lot more you can do if he isn't even willing to try to sort the problem out.

Dump and move on if it's a deal breaker (I'm not surprised it is)

This would gross me out in a partner. But it’s certainly interesting to see how different the responses are to the concurrent thread on here where a poster is talking about her husband being unhappy with her becoming obese. The replies are telling her he needs to get counselling as feelings shouldn’t have conditions attached.

If my breath was bad i would want somebody to tell me, but then I think I would already know it was.

YUK. The thought of kissing someone like that makes me feel queasy and i also would not want them near my bits either.

He needs to go to the dentist and get the underlying issues sorted. He shouldn't have to live with that and neither should you. If it's affecting your relationship and sex life, why wouldn't you want to resolve it? If he can't be bothered, then you need to ask yourself if you want to put up with that in your life.

I just can’t get in the mood because I can smell his sour breath

If dentist can't find a cause it could be a stomach problem

What would piss md off is you've told him four times and he has done nothing about it apparently.

Sour smell is often stomach issue like reflux.It can be about diet 5oo rather than just the tooth

Can he afford a dentist? My friend had to pay private one couple of months ago because NHS ones weren't doing appointments here.

He obviously has a medical issue, bud depending on the area it can be bloody hard to get non urgent appointments.

NHS aren’t doing routine check ups here but if you have a problem they will see you.

Yep, GP and/or dentist as soon as that is possible, and in the meantime he can just buy some listerine. If he’s not prepared to take steps to improve things then you are quite within your rights to be pissed off.