I think I gave you advise before, on a previous thread. I guess it did not help much, but the ladies above are right...it is often a mental spiral like this:
Premature happens > embarrased and worried it will happen again > Next time you have sex, thinking about it and focusing on it > the worrying causes it to happen again>Back to start.
Have you asked your woman how she feels about it? Have you talked to her about it and how you feel? often it helps ease the worries if you can communicate and have your fears put at ease. If you have already talked about it with her, I am guessing she said it was not an issue for her, but you don't believe her?
Okay...I am older than you and had multiple relationships over the years. Out of all my sexual experiences I only knew of ONE man who had such control over his orgasms that he could bang away for hours and choose when to cum. Truth? I found him and his "skills" boring! (and sore)
I often wonder why guys worry so much about having an orgasm quickly? This is a serious question because when the shoe is on the other foot and a guy can make a woman orgasm in 30 seconds...he is PROUD of that...so is she...everyone is happy and gloating. So why when a man lasts a short amount of time, is it a bad thing? IT ISNT! From a female point of view, some of my FAVOURITE sexual memories are experiences with guys who had a fast orgasm. Maybe its an ego trip, but I think it is HOT! I mean, what is not to love about the fact someone desires you so much they can't help themselves?
This is the crux of the matter for me....if I am with a guy who cums really fast, does he then stop, roll over and snore or does he continue to pleasure me if I have not had an orgasm yet? After all...MOST woman tend to orgasm from vibrators, tongues and fingers and only about 30% can orgasm from PIV penetration alone...and even some of those cannot do it every time. So why do men centre their ability to please a woman specifically or most importantly around what their penis can do? The penetration and intercourse is good and nice and hell yeah but...it is NOT the be all, or even the CHOSEN route most women would take to orgasm.
Sex is supposed to be about two people being intimate and making each other feel good right? There are so, so many aspects to doing this and penis in vagina is just ONE of them. Its about closeness, touching, kissing, tongues, fingers, toys, talking, holding, stroking...etc etc I dunno about other women but for me, the sex is just one small part of that...how small? Well often my partner and I don't have sex! We "have sex" almost every night, but the penis in vagina thing only occurs maybe once a week, twice a week, because we are massively into the foreplay
Why is it called foreplay!!!! Its definitely misleading. For lots of us foreplay is MAIN-play.
And your gunna love this...and you can call me strange but I actually LIKE my guy to be prem. We have a D/s relationship in the bedroom and to be honest, I am not half as interested in having sex with him if I know he is going to last a while. I take great pleasure in keeping him in chastity, teasing him for days/weeks and edging him for hours BEFORE we might move on to sex....him struggling to last is sexy for me...it always has been part of my fantasy, part of what turns me on. I love taking his control.
Maybe some of this might help change your mindset around premature ejaculation, maybe not but you need to know first of all you are normal and secondly there are lots of women, not just me who either don't care or mind at all if you orgasm fast and even some of us who find it a huge turn on!
At the end of the day, fretting and worrying about it is, at the moment, making you want to avoid sex. That sucks and it doesn't solve anything, so you could try not worrying (as hard as it is) and accepting this is you...this is who you are and embrace it? Make something of it (like my partner and I)...make it enjoyable and fun? I actually imagine in doing this, you may even notice it kinda goes away and then you might be one of those guys wishing it was back (Yup, they exist too!) hehe
Hope that helps.