Should I be worried that my boyfriend is a pothead?

We’ve been dating for about 3 months and I knew he smoked (just not everyday). He has a great steady job, and he is one of the smartest people I know. It only bothers me when it feels like he’s blowing me off to go “hang out” with his buddies, but that is rare because he is the sweetest boyfriend I’ve ever had. I am a little concerned with the future… is he always going to smoke weed? Will he grow out of it? (he is 27 by the way)