How do I get him to sext me!?

Me and my boyfriend (ex at the moment cause of family reasons) we can't be together in person for a long time. Like my family is just crazy and won't let me see him right now. And so he dumped me right now cause we just have stuff to straighten out. But anyways back to the question! So he doesn't text a ton. And I do. And I can't have him in person right now!😩 and my sexual withdrawals are thought the roof! I miss him so bad and he says he wants me back and talks about how much he needs and wants me and stuff but he won't talk about sex or anything. And I don't wanna be like heartless about it. But I wanna sext him so bad. Like just to listen to what he wants to do to me and stuff! You know?? Like he is the love of my life. And I feel 100% comfortable around him. But I don't know how to tell him like " I wanna sext cause I'm horney and love you and miss you" cause I feel like that's heartless. Hahaha