I want to start a relationship

I've been hooking up with this guy occasionally and its not like he just comes over and then we head to the room when he comes over he'shere for a good while 4 to 5 hours long while we met back in 2020 and have gone on a few dates like 2 or 3 maybe we'venever broughtthe subject up about dating but there is major chemistry id like to bring it up but idk how and im nervous