Ok so I'm 18 and I have this problem where I can't get completely hard when it comes time to have sex with my girlfriend. She's a super curvy Asian girl (rare I know I got lucky aha) so its not that she's unattractive. Initially it was stage fright obviously and I got it up eventually that first night but its been months since, and I still have that problem. It won't peak out hard enough. I can be rock hard ready to go during masturbation or foreplay with her but soon as we're about to have sex it just deflates a little I guess. Because of how her parents are (super strict on her seeing me alone) we can hardly have sex so it's like we never get to have sex an when the rare opportunity arises I can't get completely hard. Could it be stage fright still given the situation? If so does anyone have any way to overcome this?