<human>: Can you condense the text into a few key points?

So I just met this chick and it seems like I've known her forever. We have lots of the same hobbies and she's even a redditor. I've been in a relationship with my girlfriend for over 2 years, and I know what it felt like to fall for her and then progress to where we are now. But I've never had this feeling before. She's a super fun person and kinda like a bro, where as my girlfriend is your more classic 'kittens and pinterest' kinda girl. I hung out with this girl a few times over the last week and I find myself wanting to continue chillin' with her, and I still enjoy spending time with my girlfriend. This other girl is pretty cute but I'm more attracted to her personality, but I'm happy and comfortable with my girlfriend who is also quite the looker. I'm 19, to but things into perspective, and I'm just wondering what does it mean when you feel like you've known someone for a long time after just meeting them?
<bot>: Have a nice girlfriend, 2+ years, happy relationship, met new girl, seems like I've known her forever, what do?