I do not like /agree with new boyfriends boundaries, are we doomed to fail?

Been seeing this guy for a few months and it's going so well. We both feel that there is potential for a serious, long term relationship here.

We've both been screwed over before, so I proposed we sit down and have a chat about things in relationships we consider boundaries / red flags.

The first one he brought up was cheating and we both agree that it's a zero-tolerance thing, which is great.

However, his next point really struck a nerve with me. He said that he does NOT believe in sharing passwords / PINs and going through each other's phones. He has had too many problems with girls who deliberately looked for stuff to get angry about, things from BEFORE they were together, and just not respecting his privacy in general and so said he will never again be in a relationship with a snooper and will NOT be giving his passwords out.

This kind of bowled me over because I am the complete opposite, I feel that couples should share everything and have complete openness to show they trust each other and that they are trust worthy, and we got into an argument about this and he REFUSES to budge even slightly, are we doomed, how can I bring him over to my side? I"m a firm believer in no secrets or privacy, when in a relationship you are ONE, there is no "mine", just "ours".

I do not like /agree with new boyfriends boundaries, are we doomed to fail?
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