Basically, I recently got dumped by the first girl I've ever been serious with. In fact, if I have to be honest here, she was the first and only girl I've ever slept with (at age 20).

She keeps telling me to move on, but I don't know how :

- I don't want anyone else, all other girls seem completly inferior to me, and would ruin any chance I have of getting her back.

- the only girls I know are either taken, out of my league, or HIDEOUS

- since I've only slept with one girl, and had to wait so long for her, sex has become something that only equates to love to me. I'm terrified of sleeping with anyone else, it was my ex's first time too and I don't want to ruin that. I don't want sex to become meaningless like for eveyone else I know. Plus I'm afraid I won't be able to perform for another girl, as happened before

- basically the only reason I'd go with another girl right now is because I feel that I "should", that its what society expects and that if I don't I will be a weak pathetic little virgin again, and the longer I'm single the worse I'll feel about myself.

Advice? Please...

have you thought about why you want to get back with her? is it that you want to be with her or because you dont want to be on your own? sadly you are not experiencing love its lust! and the fact you dont want to be lonely

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life sucks and then you die! deal with it

Surely if I just didn't want to be alone I'd go with any girl that wanted me? Which I wouldn't do? I know I love her, you hardly spend months apart from someone in a long distance relationship, in the meantime turning down girls you'd usually kill for if its just lust.

the problem is this you've waited to lose it with the girl you presumed is 'the one' and that you were only going to be with this one girl for the rest of your life, the thing is its very unlikely the girl you first have sex with is the one unless you were saving yourself for marriage.
to be clear are you asking for advice to get over your oneitis or get the girl back?

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life sucks and then you die! deal with it

We were engaged, I never thought I'd have sex with anyone else until now, and tbh the thought doesn't appeal to me at all. I know we won't get back together, not any time soon at least (I'm talking years). I'm basically just afraid of sex with other girls, I'll be as nervous as if it were my first time again, and that never helps on performance. I don't know how to get over it?

Probably the only way to get her back, if there is even a slim possibility, is to make her jellouse. She would have to think that you moved on to someone BETTER than HER (in her veiw of it). That your status went up and above her own.

Hard as it is, and I'm sort of dealing with something similar, You just have to seek to be with someone better than she is, REGARDLESS of getting her back.

Someone better does exist, it just doesn't seem that way now because you KNOW her, and NOT the countless others.

I think what makes it worse is my lack of confidence making me think I can't get anyone else except a fat ugly psychotic girl I know wants me. Right now I genuinely believe I'm going to be alone for years.

it's too late too get her back... develop a game, go out to some clubs, go sarging at the mall... after you've already had ANOTHER gf, then she can like you again. If she broke up with you, then she probably had been wanting to do this for some time... Seriously though just read the venusian handbook, once you have a structured way to approach women and you understand there attraction switches.... just having that knowledge will make you feel that you can master it. You'll start to feel better.

I would avoid talking to her completely until your 100% over her or with another girl. Honestly anything you do is just going to drive her away more. Your needyness will make her less and less attracted to you. delete her pics from your computer, throw out her stuff, just wash her away from your life right now. Write her phone number down (delete it from your phone) give it to a friend to hold onto until you have another girl.

your situation-two words: Scarcity mindset. Max Weiss explains it in his book. To feel better about yourself and stop thinking that nobody will like you except for this girl(which she probably doesn't anymore, maybe just some weak connection, although there is probably someone else) you need to start having sex with other girls.

I've heard of one book, but I've never read it. Gunwitch method. From the reviews it is exactly the book you need if your goal is to get laid. And that is your goal for now. Maybe after some time you might come together again, but I wonder if then you'll want to be with her, since you'll see all the countless opportunities in front of you.