Turned on/off. Stamina

Mya

Me and my partner have a lot of sex roughly about 4-6 times a day when together. He always cums, his stamina isn't great because in the 4 sexual months of being together he only just made me cum 1 week ago twice. He get really upset that it's not happening at the same time or pretty much at all for me. I love the sex we have it's great but too short- I know there's foreplay but hes a giver and so am I but I managed to push him so he's mainly the receiver because it's quicker and easier to make him cum. I do get a bit impatient and I know cumming isn't the goal (at least not for me all the time) but every time he does cum and I'm super turned on my switch goes off. He wants to carry on for me but I'm no longer aroused. He's upset thinking he's disappointed me, it's just a sigh of disappointment but I'm not upset uno? Am I the only one who gets so turned off? And what's the best way to increase male stamina ladies??