I don't know what to do besides throw in the towel on this relationship. Any suggestions?

He says he respects me but he can't communicate worth a darn about important facets - such as his workload increasing considerably recently

He's blamed me for getting frustrated and even simply confused by his lack of communication.

As examplifed by how now he says let's take it slow, we've hardly been rushing as it is - so I don't know what to do about that

But denies that he's doing this / punishing me for his inability to communicate

And twice he's randomly spouted that he's not cheating without provocation. Like I haven't given the tiniest hint I think he is, but he's saying that he's not.

.

Quite honestly the relationship is overly stressful for no reason.

And the stupid thing is is just 2 weeks ago everything was perfect 🥰. Like I really like him and thought there was serious potential

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What's worse is he turns the situation around on me - he says he wants to take it slow so as to not stress me out. If he could do a simple courtesy and say look I'm busy, I'm stressed with work - but he says that he's having problems at work only after I bring up his lack of communication which makes his claims seem more I don't know less legitimate somehow - then there'd be none of these issues whatsoever.
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His parents had a toxic relationship wherein the mother berated the husband for being late, forgetting things, etc. when the husband worked very hard to support the household. I figured out that this may be cause for some of his communication issues.

And why I've tried very hard to be extremely patient and understanding and supportive but it just constantly backfires because he can't communicate the simplest things - like last 2 days been stressed at work. It takes 5 secs to say works' insane
I don't know what to do besides throw in the towel on this relationship. Any suggestions?
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