A rustic lover is often referred to as a person who appreciates or enjoys rustic style or decor.
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A servant., A young man dwelling in the country; a rustic; esp., a cuntry gallant or lover; -- chiefly in poetry.
A lover of beauty is called an aesthete.
A freedom lover is often called a "libertarian" or an "advocate for liberty".
A married man's lover outside of marriage is called a mistress. There is not such a clear cut term for a woman's lover outside of marriage. He may simply be called her lover, he could also be called her boy toy.
A naturist is someone who could be considered a wildlife lover.
The opposite of rustic is urban.
Rustic is an adjective.
A lover of animals or a person opposed to animal cruelty is called a zoophile.
A lepidoptophile
The rustic cabinLooked out of place In the suburban neighborhood
The rustic cabin had a sceninc appeal to it.