If you are not a neurological doctor or someone who really has studied these things scientifically then I think there is no point talking about this points.
It is just a simple kiss. I think you are overthinking this. Everyone is in their own heads and really self absorbed. They are not thinking of you. Some people have different partners in one week. Just let it go.
I have read many books but most of them just jump around the topics never cure the real deal. I think everyone has to find out his own way to deal whit specific stuff.
Your brain recovery depends on the stuff you eat. Try to eat full, healthy diet and never let you glycogen go down. Your brain chemistry needs time to get back on track
I have been researching how to not feel this anger all the time and even went to doctor. I feel slight anger all the time and sometimes it escalates to a big anger. How do I cope whit this. I don't want doctors to put me on some strong drugs.