<human>: I was always interested in the "best friend" (lets call her Kay), however, after multiple attempts in trying to talk to Kay and ask her on dates, she didn't seem very responsive. I figured we were just friends and won't be anything more.

I started talking to her friend (let's call her Jen) and I continued to talk to her because I guess I enjoyed the attention. I was never "interested" in anything more than just talking. It started getting awkward when she would ask me to come over late night and I never did.

Not sure what happened exactly but up until 2 weeks ago, me and Kay started talking more, going on dates, and pretty much hooking up the past two weekends. Today she's asked me if I was ever interested in Jen, I said I was never romantically interested but I was just talking to her for fun.

Kay proceeded to tell me her relationship with Jen is now on the rocks and strained because she did stuff with me despite knowing Jen was interested. Not sure what to do to help the situation and continue with Kay. Please don't judge me! Thanks reddit..

Condense the text into a few key points
<bot>: I've come between two best friends and feel responsible. One knew the other was interested in me but went for me anyway. I want to continue with this girl. What can I do to fix this?