Finally, a thread I know something about!
I'm guessing that almost every guy pool player who is in any kind of relationship has to deal with the situation you're describing. For me, I've been dating my fiancee for a number of years now and suffice it to say, if she didn't work at the hospital 3 or 4 days a week from 12pm to 12am, we'd be drawing-dead for sure.
In fact, I think I've lost every single girlfriend I've ever had due to "playing pool too much." In the beginning, they ALL say the exact same thing:
"Oh my God - you really play well! In fact, you're the best pool player I've ever seen!"
(NOTE: That's only because none of these broads have ever seen ANYONE who can play, play.)
... and then they all continue to say (does this sound familiar guys??):
"I can't believe your other girl friends never supported you! Well, I'M GOING TO SUPPORT YOU BECAUSE I LOVE YOU AND YOU CAN REALLY PLAY!"
And for some reason, guys, we keep buying this bullsh1t because we all love to have our egos strokes just like some other things, so we feel EMPOWERED! The next thing ya know, she stops supporting you because, well, she always knew you liked to play pool, but not THAT MUCH pool!
The next thing ya know, you're getting "The Sit-down" where she tells you that she's concerned about your relationship, how you don't pay attention to her, how she feels you love pool more than her (*** any of this sound familiar??? ***), and eventually tells you it's just not going to work out... and how you need to find someone who supports you in that endeavor because it's not for her. In the end, you feel like kicking a hole in the wall, because it was HER that told you she would support you in the first place and pumped you up to play better at the beginning of the relationship!
I often see guys with wives or girl friends who have their own cue, their own case, might even own a glove and some actually play really well! Can you imagine how luck-boxified those guys are? To have your woman bug YOU to go play? Psssh... that's like... "The impossible dream."
Back to the OP's specific situation--
Whoever you're with long-term must:
A) Not give a shit (as long as you're balanced in your behavior / pool playing) and not try to control you.
B) Have their OWN hobby that they can do while you play pool. I think you should have 2 days a week where you each can go do whatever without getting hen-pecked to death. If they don't have something to do that day, tell them to garden, do laundry, cook, read a book, watch Geraldo, do something - just don't hen-peck your teeth in because they resent the fact that you have a real hobby.
C) Works a different shift
D) Plays pool too.
If your wife doesn't fit within A/B/C/D, you're up shit-creek without a paddle, buddy.
NEVER EVER EVER quit playing pool because she voices her concerns that it's ruining your relationship. Mind you, you MUST be balanced: you can't play every day and you have to spend the majority of the week doing their crap (which earns you the right to do your crap).
Take it from an expert in this field (ME): If you ARE balanced in your behavior and they STILL give you the sit-down talk and you DO stop playing pool because you're rattled and you actually love the woman, it NEVER stops with pool. They'll make you quit whatever and try to mold you into some robot stepford-husband BS that lives for THEM and not yourself. It's like having sex with a gorilla: You're done, when the GORILLA is done. Never forget that.
Not to mention, when a guy who is a pool-player at heart quits playing pool, it's like being a pornstar who is trying to not have sex. Eventually, you snap and bang the world - or, more to the point: play pool 24/7 without a care if she is there when you come home.
If my fiancee worked the same shift as me (8am to 5pm, M-F), I'd be single. Whenever she works, I'm at the pool room. When she's not working, I'm doing what she wants to do, for the most part. If she switches jobs, I'm screwed.
You can't quit pool - it's in your nature.