i ended things with him because he started smoking but now i feel like it was a mistake?

gosh i hate coming on here to ask but i think i get some feedbacks from ppl who prob has had a lot more experience in relationship than me. ive only had one serious relationship and i would talk to my girlfriends but they just like to bash on guys and i get offended if they did this to my ex. so heres the story... i started dating this guy back in may and we had our ups and downs. we never really got in to a big fight and even tho we were very different in a lot of ways, we always had mutual respect and understanding.... as well as a very satisfying sexual relationship (no overstatement). so after a low month (August) he's been doing a lot to make up for it this September. He's been great actually. BUT yesterday, i found out that he started smoking cigarettes. he says it helps 'calms' him esp. during his grave yard shifts. he does 10 hour shift of laborious work every nite. so that was to me, a dealbreaker. there are other things i can nitpick that i dont like about him .... but then again, there are things i really like about him and how the way he treats me.

i know i ended things on the right terms and he asked if we can still hang out but i know that he's crazy about me sexually and i will only end up kissing and touching him again too. i never been with a guy like that before who made me feel very desirable and it's intoxicated because he's very attractive, kind, humble and genuine. even tho we didnt connect much when we talked, i think i like to believe that i dont like him that much and vice versa but im afraid that we will both end up missing one another because we were always consistent and respectful of each other, plus sex was mindblowing..... did i do the right thing or did i jump in to the decision too fast??