Priorities, man.
If your girlfriend is worth staying with, don't let Celtics basketball or Patriots football Edited. Profanity and masked profanity are against forum rules and may result in discipline. up your relationship. And if she's not, do whatever the Edited. Profanity and masked profanity are against forum rules and may result in discipline. you want cause who cares?
If you are really interested in getting her into Sports, try to get her to find a team she likes. Yes, it might not even be the Celtics--but if you can get her to like one team, you can get her into the sport, and once she gets into the sport, there's a good chance she'll enjoy the games more.
I'm a Pats, Celtics, and Uconn fan. My girlfriend is from Kentucky and never really liked watching sports at all. What she does like is winning. When it was Uconn vs UK in the finals 2 years ago, she turned into a UK fan because she loves competing against me (I had to sleep on the couch after we won). This last year, she watched with glee as UK made it far in the tournament and Uconn failed to make a tournament appearance, but the more she watched, the more she cared about the rules and the more she understood the game. Near the end of the tournament she was watching the other teams (not UK) play because she enjoyed watching basketball. I now can watch hoops with her and it's a lot of fun. But she's still not a Uconn fan.
It might be similar with you and your girlfriend. Find a way to make her connect with the sport. If she's super competitive, maybe she'll like the Lakers (just so she can compete against you). If she likes winning, maybe she'll like the Spurs. She needs a personal connection to the team before she'll start to care about the sport--once she cares about the sport, she'll watch your games too (although, if she's a Lakers fan, she might rout against the Celtics).