Please, that’s absurd. He believes in civil unions and therefore is not conservative.
I support Civil Unions and I am a conservative.
The government has no business whatsoever regulating or licensing sexual relationships between adults. Any conservative ought to balk at the notion that you need to get the state's 'permission' before you can do something as personal & private as getting married. If people want to form voluntary enforceable contracts, powers of attorney, etc., to delineate their relationship for legal purposes (just like business partners), that's fine.
There is an obvious disconnect between YOUR narrow interpretation of what constitutes Conservatism and that of others.
Who gave you the job of defining “conservative?”