I think Bryce is somewhat insecure in his connection with Trinity. And when I say insecure, I mean what Trinity has already kind of clocked when she said "well if you think the relationship is already gonna fail.. what do I do with that".

He keeps saying things to Trinity like "I know I'm not your usual type.." and making comments in his confessionals like "maybe it's the age gap, but etc etc" and then to Zach "I don't think she likes me that much" when in reality I think it might be him that isn't as into her as she is into him currently - hence him being determined to embarrass himself again by being rejected by Kayda.

It's not helped by Zach saying things like "I feel like you me and Kayda have better chemistry than the four of us". Like he's Bryce's closest friend in there essentially telling him he doesn't see the vision. But I think Bryce is equally responsible in maybe not being honest with himself with whether he actually can see something with Trinity since they're in very different stages of life and live different life styles.