Feeling uncomfortable is something that happy people temporarily accept until the situation is processed, learnt from and then released. When you are feeling uncomfortable remember, it will not last long and you can always walk away however by processing it, learning from it then letting it go will be an invaluable experience that will get easier each time you do it.
Respect your feelings as they are valuable messages that should be acknowledged and never be blocked out. It is ok to feel uncomfortable sometimes.
Happy, positive people expect the best outcomes, entering many situations with a nothing but the best will be achieved or happen mind-set. They are always thinking that everything will turn out for the best and it usually does.