Yes, this is not unusual for me either. I beleive that its a compulsive behaviour to adapt yourself constantly to your surroundings. I for one always want to feel that I fit in and therefore depending on which group I am around, I do think that I adjust my personality accordingly to avoid these negative reactions.
It s difficult to comabat, hence why I do most things alone if I’m honest. But, it doesn;t mean that you can’t look forward to things in the future. Try to plan things that you enjoy.