how do I tell him

Ok so me and my bf tried having sex didn't plan as expected. Since then we haven't tried. We still do other stuff. Like he plays with my boobs and I suck his dick. But he's the only one cumming. Idk how to tell him that I want to cumm too. Cuz once he cumms I get really turned on but for him he's done😑  So basically how do I tell him that I want him to eat me out or at least finger me. Kinda scared he's not gonna want to or not comfortable. We are both virgins so I doubt he knows where the clit is anyway. Ugh