Background Information:
Basically, I don't have enough time. It's an annoying problem that I guess most people share, but it still bothers me. I have so many things I want to do (books to read, stories to write, pictures to draw, games to play, software to develope, languages to learn, tv shows to watch, stuff to read up on, etc.) that I never have time to do them all. A lot of these things I also have to schedule with my friends so that complicates matters even more.
I have games I want to play sooo much but I can't find the time because there are other things I want to do even more. I've been wanting to learn Korean for quite some time now but while I can write and read it, I never had time for it to go beyond that (meaning I don't know what the things I'm writing or reading mean).
Just hanging out talking about stuff seems like such a huge waste of time and I keep thinking about all the things I'd rather do, no matter how much I try not to. I can tolerate it in short bursts (half an hour maximum), but that's about my limit without being bored out of my mind.
The same goes for going out to drink. People always seem confused about that part but going drinking just bores the hell out of me. And then it also wastes a big part of the next day, which makes it even worse. There are just so many better things to do...
I still do it sometimes... I mean... I do give in at some point when people keep asking again and again. When a friend really 'needs' a drink, I won't let him drink alone either. I don't actually have a problem with drinking and I know I also feel good while I'm drunk, so I get why others like it so much, but for me personally, there are just better things to do with my time.
Now so far, I've lived a pretty happy life (and plan on continuing to do so).
I've had a roommate with whom I shared no interests whatsoever. I still liked him and we were on good terms but we never really hung out. Basically: The world was good.
The Situation:
Now we got a new, additional roommate, with her boyfriend.
And they... I don't know... they just seem bored.
They basically only have one hobby, which is great but they can't do it all the time (would be too expensive) and I don't have any interest in that hobby and won't ever even try it because the money it would cost and the time I would have to invest before even being able to try it just don't seem reasonable (they like to drive around on motorcycles and I would have to at the very least get a license to even try that).
So they hang out in our kitchen and my other roommates room a lot. Both of which is fine, I don't even mind the times they are loud. I'm really good at tuning out background noises.
However, they keep trying to rope me into spending time with them. When they hang out with my other roommate, they want me to join them. When they are in the kitchen (which is right next to my room), they keep knocking and asking me questions (really polite and even nice questions, but I'd still prefer them not interrupting me). They cook too much food and invite me to join them (alright, alright, this one isn't actually that much of a problem ;)). They ask me to go shopping with them. And so on.
It's generally all extremely nice of them, but the problem is that spending time with them is boring to me. I really like them. I think they're great people. But I just don't have much in common with them and I keep feeling like I'm just wasting time when I hang out with them.
Although I should mention: We do all like to play board games and we already had a couple of fun evenings with it. I would not want to make that a daily - or even weekly - thing though, especially because unlike me, they really like to drink a lot during those evenings.
They don't share any of my other interests and seem to be completely baffled that I enjoy them so much. They are extremely unlikely to understand that sitting alone in my room reading a book is more appealing to me than - for example - going for a drink with them and I feel like saying it like that will come across very, very wrong.
I do talk to them a couple of times a day (and that part doesn't have to change as far as I'm concerned), always friendly and nice, genuinely interested in what they're saying (I really am) and even when I'm annoyed by them interrupting me or asking me to spend time with them I always remain as polite as possible. I've also never been in a bad mood or just brushing them aside or anything like that when interacting with them.
I know that they already know I'm trying to keep my distance from them, and I also know that it bothers them. I don't know if they think I don't like them or that I'm just being rude or maybe they think I'm too... idk... scared...? to ask to hang out with them but in my heart of hearts really want to...?
Either way, I'd like to sit down with them and try to explain the situation but no matter how I try to phrase it in my mind, it just keeps sounding incredibly rude and unfriendly and I can't imagine them really understanding it, even if I do explain. I would very much like to stay on good terms with them (as I said: I DO like them and I'm still gonna have to live with them after all).
My Question:
What would be a good way to explain this to them without offending them?