is he just using me

im 17 and ive been talking to a boy for about a week. we decided that we would try oral sex (i’m a virgin and had never even seen a guy naked in real life)

i gave him a blowjob at school and afterward all he did was give me a side hug and say thanks. he texted later and said we should do it again but i get the feeling that he’s just using me.

should i approach him about it or just wait