Hi Lexy.
First, the short answers to your questions:
Yes, you should believe him. Yes, a man can like a woman and be turned on to her and still have conflicts about sex that prevent him from relaxing and enjoying it. No, you’re probably not the problem. I have no idea whether he thinks you’re beautiful.
It’s obvious that there’s something about being sexual with you—or with women in general—that creates discomfort for him. And guess what? It’s not your “job” to find out. If you truly care about this man and want to be with him. You will help him—and yourself—to relax and stop being so judgmental. He was obviously worried about pleasing you. Worry and anxiety are the enemies of good sex. If you can’t relax, you can’t enjoy yourself. I think he also had a very quick orgasm for the same reason.
So what’s your next step? Talk to him and tell him you understand that he was nervous and worried during your first time together. Next, ask what the two of you can do to make things more relaxed and pleasurable. Tell him there’s no pressure on him to be erect, etc. In fact, just touching pleasurably is something the two of you can explore instead of having to get to the “main event” and putting so much emphasis on it. My guess is that once the two of you can relax together, things will be fine.
If they’re NOT, then you might encourage him to write to me himself, since I don’t know what his issues are—and neither do you. Best of luck to you. Dr. J