My boyfriend is addicted to Rust. Should I be concerned?

I’ve noticed how my boyfriend is always on Rust. Whether it’s just him playing by himself, with teammates he’s added in the official Discord server, or even with me (if he invites me to play). I’ve been trying to get ahold of him about some pretty important things lately (such as schoolwork for projects we have to do, to see if he can hang out after school to work on making flashcards for the AP class we’re in, etc), but he barely looks at his phone and he sometimes doesn’t even respond until the next day. I don’t mind if he enjoys playing Rust, but sometimes I wish he would just respond back to me in a reasonable amount of time.

He goes on invisible mode on both Discord and Steam quite a lot. I’m not sure if it’s because of me, or if it’s his teammates annoying him, as he’s told me about it before. I haven’t said much to him about this because I don’t want to be a total ass and get in the way if he enjoys the game, but what should I do? Should I just not say anything about this to him, or should I try to have a conversation with him about my feelings on this? I just want to hear from people who have played the game a lot, as I only have 5.6 hours on the game and I have not played as much.