Loving someone with ADHD

First of all, my husband is AMAZING!!! He's very sweet, and he's amazing with our daughter. He helps with her so much!
But things aren't always easy. He has ADHD, and he doesn't want to be medicated for it. He was medicated for it once, and hated the way it made him feel. So he doesn't do meds now.
Anyways. It's really hard for me sometimes because it feels like we can't have a normal relationship. I'm a one-on-one type of person. I can sit and talk for hours. But I can't do that with him. I've never been able to. Sometimes I will be talking about something really serious and important, and he'll jump up halfway through because he needs to go outside and smoke. And it makes me feel like he just doesn't care about anything I was saying. And then when he comes back in from smoking, he'll say something completely unrelated to what we were talking about, and not even bring it up or mention anything about it. Most the time I don't even bother trying to talk to him about personal things. But I feel like it's putting a strain on our relationship.
I get so frustrated because I already barely see him. He works long hours, and also works super late at night. Me and my daughter are morning people. So I see him for maybe 2 or 3 hours a day before he leaves for work. And he spends most of that time outside smoking and playing games on his phone. He's seriously addicted to a particular game on his phone because he says he always "needs a distraction." Because on top of the ADHD, he has really bad anxiety.
I try to get him to talk to me about stuff, but he never has more than a few words to say. I feel like he doesn't know how to be personal or talk about anything "real." Like, he just wants to talk about his games and movies and stuff. I just don't know what to do...
He treats me very well for the most part. But, it's hard feeling like I can't talk to the person I'm married to...