I 17M like a girl 17F that has a bf, but she likes me back.

I have know this girl for about 4-5 years now, we’ve been friends, but not very close. That was until this past summer, we spent a lot of time together. I started to hang out with her and her friend group a lot. Eventually I came to the realization that I had feelings for her. Here’s the problem: she’s got a boyfriend of 2 years, they’re going solid. I kind of decided to just hide my feelings but still hangout with her. But things felt weirdly idk intimate? Texts and calls turned into comforting her about problems and whatnot. A couple weeks after that, she told me she liked me, still not knowing how I felt. I don’t really know what to do, and it took a long time for me to tell her how I felt and I eventually did. She still wants to stay loyal to her bf, but also doesn’t want to stop hanging out and talking with me. I feel like me talking with her and how intimate some conversations feel, it’s like emotional cheating or something. What would you recommend that I do? Cut contact? Set boundaries? I really like her but I definitely don’t want to ruin her relationship ship or do anything wrong. Any advice would be greatly appreciated