It's called performance anxiety. It's actually pretty common. You just need to relax and it will happen.

as long as the girls understandin it should be ok

Heck first make out have oral sex that will get u back in the swing of things im sure

Wait a year.

You could try a cock ring. You slip it over your penis when you're soft, then when you get hard, it keeps you hard (and you remove it either by stretching it out, or with a quick-release mechanism, depending on the design). Generally they're available in sex shops, but you can probably order one online. Could the problem be caused by desensitization due to condom use? I mean, do you get hot making out, then throw on a condom just before intercourse, only to see yourself go limp? If so, try this instead: when you're making out, and decide you want to have sex, put the condom on, but go back to making out for awhile. Give the latex time to warm up to your body temperature, and give your penis time to get used to the feeling of being sheathed. Then, when you do finally penetrate her, not only will it be more spontaneous and exciting, but your penis will be sensitive again, and your libido will be hyped up from the making out. These are two physical solutions, but your problem might be psychological. If you're suffering from performance anxiety, what you need is to take the pressure off. Stop planning on having sex when you make out. Instead, explore your bodies and all the ways you can make them feel good. Even if you don't orgasm or get totally hard, it will still feel good to get a blow job or a hand job. And even if you can't penetrate her with your penis, you can still give her pleasure through oral sex and through penetrating her with your fingers (for instance, try to locate the G-spot, which a penis usually can't do). Try erotic massage. Have fun with it! And if you do develop and maintain an erection, go ahead and have sex -- there's nothing saying "no sex," the point is just to say "not necessarily." If this problem continues, you might want to speak with a doctor, to rule out a medical condition.

I say look at the ladies parts, listen to her moaning, and forget that you have to please her, for now, and let yourself go. Don't worry too much as to how she is rating you. The more you have sex the more you will be able to perform and satisfy yourself as well as the ladies. Don't do it yourself or you may end up depending on that. Also what are your fears? Pregnancy? use protection. If you don't feel secure about protection then wait until you are confident that you can take responsibility if pregnancy occurs. Hope it helps with your anxiety.