Many people mention that you game too much when it "interferes with real life", but since RPGs is such a big part of me, I don't mind it interferring with family, friends and so forth, because for me it's just that important.
Luckily, my girlfriend through 6 years is a gamer as well, but I just can't see myself NOT gaming to spend time with other friends and so forth. Why not do the things you like the most whenever possible?
That said, I usually game 3-4 times in a two week period, 2 of the sessions being 5-6 hours and the third being 10+ hours. If we manage a forth game in two weeks, it's also a 5-6 hour game.