You seem to be falling into an all-too-familiar trap again and again - the waters of love are turbulent, and those looking for calm pools can quickly find that they actually start to get bored there. Maybe that's why you're drawn to stories that are often unfinished and unattainable. Lovers and casual sex also have their dark side - it often happens that you get attached to your partner and can't get them out of your head... and because of this, you constantly think about the person you like!
You look at your phone too often. You can't concentrate. You find yourself staring at a book, but your mind is somewhere else entirely. Are you familiar with this scenario? Despite the fact that you try not to make your loved one the central topic of your everyday life, it is you can't get it out of your head. Why do you constantly think about the person you like? He can also explain a little about it neuroscience - when you get involved in a romantic relationship with someone that includes (only or also) sex, you triggered by neurotransmitters, which, among other things, are responsible for the feeling connection and for pleasure.
A neurotransmitter dopamine is the main activator pleasure center in your brain. It is released in the largest quantities during sexual intercourse during the peak, which your body produces prolactin, with which we can explain on a neurophysiological level why you sometimes need after climax a moment to yourself or you get sleepy.
The main neurotransmitter that makes it impossible for you to get your partner out of your head is the neurotransmitter oxytocin – this molecule is responsible for a sense of connection. It is also that wonder of nature that encourages all mammals to care for their young. Women produce more oxytocin than men, which is one of the possible explanations why women become much more attached to them during sex even this outside of an emotional relationship can quickly mean something extremely intimate.
By understanding the neurophysiology and basic neurological mechanisms your body is under during sex, you can also see more easily and clearly why you can't get it out of your head. Maybe this article will help you separate the wheat from the weeds. It is important to distinguish between deep infatuation and connection, which are based on a special bond that includes several human spheres (sexual, emotional and cognitive) and between momentary obsession due to the short-term release of neurotransmitters.