help plsss

I rly like this guy & I talk to him on facetime a lot and now we have pe together (which is the worst class to have if you’re trying to talk to someone lol) but we never talk & it’s so awkward. I get so nervous I don’t know what to do or how to act & it results in both of us acting like we don’t even know each other. HOW do I talk to him. Online, all the answers are like “fake your confidence and go for it” but that doesn’t help me. 😭 I need real situational ways to start a conversation. Agh cause I really don’t want him to lose interest if he even has any. Tyyy if you read this!!