NEED HELP!!

Okay random... so lately my bf and I have been really sexually active and all but something I’ve noticed is that once he’s done apparently I’m done to so how do I keep him harder longer or how do I just tell him I need him to go longer. We’ve been together for 2 years and we are very attracted to each other but I don’t know how to tell him that when I give a bj I want him to finger me too. Like I said I’m just not getting satisfied from it anymore and I’ve never had this problem before now but he leave me up and wet all the time now but he’s the best in every thing!! Just need help... how to tell him we get turned on to but we don’t have a boner to show but we do get turned one and we need to be pleased as well!