I would Like to know if my Crush is using me?

There is this boy I meet on Snapchat and we have been sending nudes to eachother. Well when we first met and started snapping he would call me 'cutie' and 'luv' (wich him calling me luv was a little weird for me) but anyway he called me things like that. Well, it went on for a few days and then all of a sudden he stopped calling me those things. But I like him and when he asks me to send I send a few pics and then he doesn't say anything. He used to call me hot and stuff a lot. Also He used to answer me right away and snap me a lot, now he leaves me on delivered for a long time. And is snapping me less. Does it sound like he's just using me? Or maybe bc I didn't compliment him like he did me, maybe he stopped to not seem weird? Also, anybody know what the best way to ask him if he's using me would be? Bc I don't want him to get mad at me.
I would Like to know if my Crush is using me?
Post Opinion