Should I feel bad for doing night out at a friend's place while my other friend is not going?

So I am a girl and my best friend and I are roommate. She's really nice and we work at the same place so we have a lot of mutual friend. Now last saturday one of our mutual friend said to do night out at his place and drink and chill, I really wanted to but my roommate said she doesn't. She's not drinking now so she doesn't want to go. She didn't ask me to not go but I kinda feel guilty for going when she's not. I still went cause I wanted to chill but I'm feeling bad cause I felt like I left her out. She indirectly said that sometimes we need to think about everyone and kinda feel like she's saying to me. I feel bad about it? Am I wrong in this? I need advice.