HELP?!!!

So this guy and I have sex just for fun and I have never came before even by my self. I know that it’s hard for me too cause I’m on antidepressants but it takes long for him to cum. Is that a issue? Is there anything I can do to make him cum faster? Sometimes he’ll wanna keep going but I have to stop it cause I’m not turned on or super wet. What do I do? Also I need some evidence on how to make sex more pleasurable. I’m 17 and he’s 17. But he just takes tooo long 😂😂