My hobby pre-dates my partner of nearly 9 years... (TIP: always mark anniverseries with flowers/meals/weekends away)
We do a significant amount together, shared interests in weekends away, pub & brewery tours, history, English Heritage Castles, looking after grandkids, etc...
Just back from a week in Portsmouth & Gosport, did almost all the boats, subs, ships, Museums & Forts, a mystery birthday trip for my birthday.
We also have interests apart, and as she works shifts, supports Derby Rams, watched the World (Socker) Cup, watches some trash TV & does FaceBook, I get reasonable bench time, plus she knows where I am!
We also share & cover the bills, I don't question her Avon Cosmetics habit, she doesn't question my hobby expenditure.