Guys question please. need guys thoughts ?

ok. so i like this dude in my homeroom cl. i am a sopre in high school. umm we text each other but our conversation never really leaves the phone because i am too too shy to talk to him in person & he wants me to be the 1st to talk. he would flirt with me when we're texting but idk cause he's cute & prob got a lot of girls liking him. what should i do to boost up our relationship? what is he thinking? is he shy or something?