When dating how close is too close?

Not weird at all. But ... If the non-related cousin is [b]like[/b] a close cousin, like your little brother and she are [b]like[/b] close cousins and the families are close, I can see that it would seem weird to some, even if they aren't related. Sort of like an adopted child may not be related, but ....

Or, your uncle's or aunt's step children are not related to you or your brothers/sisters, yet if the blended family treated them like sons and daughters of your aunts and uncles, then some would feel uncomfortable with them if they dated and formed a more intimate relationship, though I personally wouldn't.

2nd cousin and beyond is legal and not considered taboo

it's also pretty common for people to unknowingly marry 3rd, 4th, etc. cousins; unless you hook up with someone from a different country and a completely foreign name/heritage, chances are good you're related somewhere back within 150-200 years

Not directly related by blood, why not?

I am past that point in life (married...) but,

I have a friend who married a cousin. They seem to have a very normal relationship and none of their kids has more than 5 toes on each foot...

My cousin could have a cousin that is no way related to me, so they are two different blood lines. I don’t see what the problem is.

No, no blood related.

so that's like 2nd cousin?
I don't think it's illegal.
I wouldn't feel weird about.

Well my uncles common law wife wanted to hook me up with her son, and I thought that was weird

Idk I feel like if you call someone cousin, it’s too close.

Not that weird. By the 2nd cousin their DNA is pretty far apart. If they click, go for it

Have they ever met each other?

My friend he has two cousins - they were married to each other.

If I underhand the hierarchy than there is no blood relationship. The only problem could be in the closeness of the family dynamics.
Although the whole discussion sounds like your family enjoys getting into everyone's business.

I think that’s removed enough

Bit complicated 😉

No prob.

Any third person trying to matchmake can be problematic…how do the two involved feel ? It’s a thin line between “helping” vs [b]meddling[/b]. Anything further than first cousins is not illegal in the U.S. In some states, [b]first[/b] cousins is actually okay. Go figure.