If there was a sure fire way to get rid of performance anxiety, the medication would sell for a hefty price !!!
Look, I'm pretty sure this has happened to most guys, I wouldn't worry about it. As much as people say that sex for guys is mostly physical, the mental part of it also comes into play. I've had the same problem myself, and trust me, it does become quite embarrassing. If this guy cares about you, he'll understand , trust me he will. It's all about the confort level. I've found that a massage or a lot of foreplay does wonders for this problem. Not to mention the fact that you're a virgin man. That alone could cause this problem, because you don't know what sex is like, the feelings involved, etc. Don't worry, keep your head up !!!!
Hell, I even resorted to keeping the TV or radio on in the background to sort of have a distraction to keep my mind off sex. My girlfriend was kind of freaked out at first, but when I started having sex with her, she forgot about it in two seconds, haha.
Are you able to become aroused when you're by yourself? If so, it's likely just performance anxiety. When you're finally able to perform to the best of your abilities in bed, you'll find that your partner will be like "wow, that was awesome", haha.
Hang in there pal, things will only get better when you start feeling more comfortable around this guy, ok?