WHAT IS WRONG

Someone please help. I'm on my honeymoon with my new husband. We're 21 and 24, and we both waited for each other so we were virgins up until a few days ago. We had been building up in intensity, though, for the wedding night, which did include some sexting and on one occasion touching each other manually down there over clothing. We also would make out on top of one another and that would always be nice :) On a couple of occasions I came just from that. He came close a time or two and always stopped himself because he didn't want to make a mess. So...now that we actually CAN have sex, it DOESN'T WORK. He can finally now get inside which he couldn't the first night because I was too tight. Now he can get in but he's only been able to come ONCE and we've tried at least 5-8 times. He's only been inside me 4 or so times now. But like he's gotten me to come several times, but after a little bit he just doesn't stay hard anymore, and even when I try I can't turn him on. I feel like such a fool parading around in lingerie and touching on him trying to make him hard again. We were going really well in missionary today and then he said he got tired and couldn't maintain the thrusting and then the erection quickly followed suit. We tried again a little bit later when he'd had a rest and no matter what we did we could not get him hard again. WHAT ARE WE DOING WRONG?! He's supposed to be the easy one and me the hard one. I've always heard the woman is harder to please. But yet he's so good at it and I can't even get him there. I feel like such a failure as a wife 😫😖😓 He keeps saying he thinks he just gets too tired or loses the challenge of getting me there or that we're trying too hard. HELP?!