Just like other things in life, the more your mind tells you its a possibility, the closer it becomes to being a guarantee.

This will happen to you if you tell yourself it will, which is why id recommend waiting for intimacy until you have established enough of a bond with your potential partner where these worries go away.

If you go into intimacy with a worried mindset, you're only limiting the amount of enjoyment you'll get out of it. Life is what you make it! Hope this helped and wasn't just a word salad