I assume that when he said open relationships, that his GF also agreed to this, so they were both free to date other people, not that he was cheating on a GF who thought she was the only one, right?
Gosh I really don't like the sound of this, but that is just me bringing in my own personal opinion. My first thought was Open? No! Case closed!
He "doesn't mind" being with "just" you? He casually diminished you and you're okay with that?
I agree with this.
If his open relationships were so "successful" then he would still be in them. Ask his exes if they thought the open relationships were "successful".
Get out of this relationship now! Unless you can handle an "open relationship" because I don't believe a word he says - RED FLAG big time.
I see him as trustworthy.
In my opitions, since the open relationships, I think he might have meant
Let me re-phrase my post
What is his idea of open and exclusive
And most importantly - can YOU handle it
I want to rephrase - I do agree he is honest and probably trustworthy. I just think he's pretty naive if he thinks he's going to convince you to go for an open relationship. If you're not into open relationships, then a guy who enjoys them is probably existing on a very different wavelength. That doesn't mean he isn't trustworthy. Quite the opposite, I'd appreciate his honesty. But to say this highlights a difference in values might be an understatement.
The way I see it He is asking you what would you prefer open or closed.