I only want one true love without an exgf

Hahhaha...
You shouldn't be so obsessed with this idea. Breakups are healthy and you learn a lot, it's a needed experience and it's why some women reject men who doesn't have any exes.
By having had a relationship that didn't work you still learned a lot about relationships and what you want and what you don't want. It's also almost delusional to expect a first relationship to last for life, you have no experience and the older you get the more important that is. You wait forever being really picky then you're never gonna find someone because no one is perfect, you're more likely to find someone with a lot of baggage though which may be harder to deal with if you're not even used to being with someone.
You learn from trying.

Good luck with that, my friend.

Get out more. If you get out enough you'll find a girl eventually. If you're single its a good idea to hang out with friends and go to parties alot. Thats how you'll meet new people. Its all about networking. Your friends will help you find a chic too often their own girlfriends will know a chic.

You are only going to learn how to love and find the "one for you" by starting to try to make gf relationships work.

You don't even know how such relationships work, or even what you want in one because you have never experienced them.

Most people date many gf's before they find "the one."

Remember that, once you love someone so much, don't expect love in return. Just wait for it to grow in their hearts, but if it doesn't, be content, it grew in yours.

I think you need to accept the fact that true love doesn't exist. Love is the worlds greatest compromise, its about learning you're boundaries and learning to live with someone even though you may not fit perfectly because, thats love.

and the only way to learn what kind of lover you are is to love, and let your heart be broken.