zootopia

I am greatul for the advices so far

Hi everyone, So 4 days ago my sister came home with a few friends for a sleepover and among her friends was this girl who just struck me the moment I saw her. Considering I wasn't part of it I couldn't interfere so the next day I come home from work and she is still there. this time i couldn't resist the urge to talk to her so I manned up and pulled her aside and we started talking. We hit it off from the start and we talked and laughed for almost 3hrs it felt like i had known her for years. I realized she was asking the most questions about myself which in my mind signaled that she either liked me and so i went the obvious root and asked if she was seeing someone and her answer was "Complicated". So i asked for a little bit of an elaboration and she claims she's been dating this guy for 6 years but lately it seamed like it wasn't working anymore. She explained a little bit about it and it looked like it was a dying relationship. So afterwards she leaves for home with my phone number and texts me back later that night and we have been talking back and forth. Now i haven't dated anyone in a while but after that little run-in I had with her am thinking about courting her . We have so much in common personality wise but I don't even know how to start considering she is still dating someone although it's not working well. So please some advice would be nice.