My boyfriend and I are both seventeen, and had sex about two months ago for the first time. Since we've been together, about five months, he hasn't always had full erections, but for the most part he did and it wasn't a problem. The first few times we had sex, he had no problems whatsoever, even the first time. He didn't even ejaculate early. However, the last few times he only lasted a minute or two, and wasn't fully hard. Now, however, he can't even get a full erection when he is alone. He doesn't want to talk to a doctor about it, and I know that he is very frustrated and insecure about it. Is there something we can do for him?