Sexting help

So I don't know how to sect.I know the basics of it but I want to say something to get him to say stuff back and get horny. I don't really send nudes only if I really like the guy but not usually so I rely on sexting. I'm only 15 and I have sexted before but only with guys I really like. But I feel weird saying "I really wanna kiss you" cause it's not so hot. Any tips on what I should send or say back???