What to do when you have to choose between two guys?

So I recently started at a new school, and met two amazing guys. And I started talking to one of them, whom rides my bus. When I first seen him something just clicked between us. So from that day on we started talking more and eventually we starte dating I guess you could say. But he never acted like we were. Until today, he started being affectionate. And of course. Out of all days today. I met this other guy who is very interested in me and I'm starting to catch feelings for him today. But they both know about each other. And today I was walking with one while the Other walked up to me. And yeah . I don't know what to do.