Pls read I need advice.

Okay sooo me and this guy like each other but for some reason I don’t knowww like I’m not good at expressing my feelings andd I’m also not good at talking lmao I’m shy like when I’m talking to him nothing comes up in my mind to talk about I feel like with expressing my feelings I am scared of rejection? I guess like I don’t knowww I’m not used to talking about how I feel he tells me everything and always talks and I’m just there listening to him I wanna try to talk more pls help I need advice.

I’m 15 btw with no guy experience sooo yeahh

What are some things I can talk about? That will make a good conversation