Can't hold full erection, esp. with GF, at age 17?

[STeasXC32]

Hey everyone, I have an issue that I really want to resolve. Hopefully this is the place to at least figure some of it out.

I am 17 years old, a heterosexual male. I run cross country and track, and ski, paddleboard, mtn bike, and generally get a lot of exercise. My diet isn't outstanding, but it is decent, and I get a decent serving of veggies and meats, as well as breads and fruits and all. I don't smoke marijuana in general, and have drank a few times with friends, responsibly, an all that. I am a good high-achieving student, taking lots of hard classes, but this leads to only 6-7 hours sleep per night and a significant amount of academically created stress.

Masturbation is common for me--I have a pretty strong sex drive. Probably once or twice a day, 10-12 times a week. Pornographic material isn't uncommon for me - maybe twice a week - it is usually imagery or comics (for some reason I prefer that to video). I have been dating a great girl for about seven months, and we haven't had successful sex. She is a bit prudish-she doesn't give oral and reluctantly will give handjobs, but is ok with vaginal sex. I will get erect on and off during foreplay and making out, and will get fully hard just hanging out with her (around in the house making out or grabbing her butt and all) but as we get close to serious sex, my hardon becomes less reliable. Then it gets bad when I try to put on the condom - I lose the boner almost completely, and can't get it back beyond 3/4 mast. She is very tight (basically a virgin) and I won't be able to get in unless fully hard. This seems to happen when I am alone as well. I will practice putting on a condom but will get pretty soft once it goes on. Also masturbating I will be able to get off when only full but not rock hard-not at the levl needed for intercourse.

I think is partially stress and anxiety, nerves; I overthink things. I have only tried to go for sex and failed like described above around three months ago. She was understanding, but since then I have avoided sex so that can't happen again. So that was 3 months ago, and I am worried that I won't ever be able to successfully try again because I will always remember my inability to perform and then lock myself in a cycle where I can't get hard because I am scared I can't. It know it is psychological but I can't get over it. Should I go for viagra or something?? She is pretty straight-laced so attempting to drink a beer or two beforehand to "loosen up" isn't really a good idea, and I don't think that's a great idea anyways. PLEASE HELP I AM WORRIED that I will get a chronic anxiety-induced ED through the senior year of high school and college that is terrifying! I get crap from my bros about not banging my girl and it is a serious issue for me and make s a ton of stress for my entire life!

[Pulsating]

Psychologenic ED.try to relax,antidepressants may be needed.Stop watching porn .

[YardBull]

From your description, it seems that your stress and lack of sleep are factors in your situation, along with performance anxiety.  If you want to be prime with your girlfriend, I recommend avoiding all porn and masturbation so that all of your sexual energy will be at hand when the time comes with her.  However, there may be times when you masturbate to take that edge off, if you will not see her for a time.  Also, it might be best to take intercourse off the table and enjoy extended foreplay leading to manual and oral methods of sexual stimulation.  That way condoms and other birth control measures are not necessary, and there will be no stressing over possible pregnancies.  Keep your priorities in mind as you go up the education ladder.  Don't let this problem interfere with your life pursuits as you move through this important time.