Hi, from whatever you have written it seems you are stressed out about the incidents that you have mentioned. You need to learn to relax and get rid of the negativity of the incident. Once you are feeling better, you can look at the situation in a different way. Maybe those two were trying to apologise by inviting you for lunch, but as they were guilty they probably couldn't speak to you properly. That's just one perception, there could be another explanation too. Try to do breathing exercises or Yoga to calm yourself. Then once you are feeling better, you can decide whether to have lunch with them. Incase you are not feeling good about it, you need not stress yourself and have lunch with them. Hope this helps, in case you find yourself feeling anxious and upset for longer than usual( more than 2-3 weeks ) , do consult a Psychiatrist who does counseling or a Psychologist with counseling experience. All the Best!