Secret Relationship

I’m dating someone in my friend group (of about 15 people) casually and we decided to keep it a secret until we know what it is. We also want to make sure there’s no drama, since two other people are interested in me and one other is interested in him. I also just want to keep it chill, since I don’t see why it’s anyone else’s business 🤷‍♀️

However, there are rumours circulating already bc we acted pretty openly into each other and I even told a couple of people I liked him. How can we make people think we're not dating?? I’m 16 turning 17 if that’s relevant.