<human>: Can you condense the text into a few key points?

We met 6 years ago and I instantly fell head over heels in love with him. He was beyond funny, gregarious, good looking and the guy everyone wanted to be around. After two years we found we were I the perfect spot (out of relationships) and started dating. Within a week I knew I never wanted to be with another man and did the silly girl in love thing and started thinking of baby names and wedding songs.

after 2 years (being honest I didn't want to see the truth) I realized that he was the life of the party after he had 3-4 drinks and he did cocaine more than I would like. And he was buying OxyContin from friends. I asked him to give up the Coke and oxy which he did but then he gradually slipped into full alcoholic. He was not a bad/mean drunk but he did drink and drive just about every night--his charm actually got two cops to let him drive home after being pulled over twice.

Then the cocaine started again and after he went through about $7500 inheritance in a matter of months I told him as much as I loved him, I could not deal with the guilt of him killing a family drunk driving and I was leavening him. He literally quit that second and has not touched a drink or drug sense (he actually had kidney stones and refused all pain killers because he's so afraid of a relapse) and I promised to stick by him through recovery.

He's made it a year and I'm so proud of him. He's done amazing. But he's not the life of the party anymore, he's not very funny anymore, he's just not very interesting anymore and i find myself missing the old days. I never want him to drink or drugs again so I would never sabotage anything. 

My worst fear is that he relapses so I'm scared to broach the subject with him and I have no plans to leave him so I just need some advice.
<bot>: Fiance is one year sober, but he's gone from being so fun to being boring. I'm looking for help in dealing.