Is marching band making me lose friends?

So I've been in band for about four years now and I find all my best friends there (because we spend so much time together). But I feel like I'm losing my other good friend who isn't in band. We used to talk about anything and everything before she quit band but now there isn't much to talk abut bc she's in dance and idk anything abt band. I know someone who can't talk about anything but band, and I try not to be like that but I feel like I'm losing her.