Yeah you are putting way too much expectations when meeting new girls. Have you ever heard of once you are in a relationship suddenly everyone is interested in you, well the reason is you are basically interacting with people without having expectations or seeming desperate. Find your passions, a relationship will find people who are happy with themselves and willing to let a potential relationship go if they feel it will not work out and do not force it to work out.
Usually that is the nice thing about finding a passion, not an addiction (this can take various forms), it removes the need for a relationship to make oneself happy, gets you out of that headspace, improves yourself and shows in a partner that you have more going on. Also it will help with love bombing and suffocating the other person.
But life is a journey, an adventure and no one is getting out of this unscathed. Don't be scared of rejection, it is healthy and seeing your reaction will motivate you to improve on yourself and be more confident with the next love interest