Welcome! You will find this site helpful through the support of members and through the tools provided that will help you reflect and work through particular situations you are struggling with. In fact, I suggest you look through the information offered in the Toolbox under Section 13: Relationships. You may be able to relate to ways in which you are feeling and how it is affecting your relationship with your fiance's family.
Have you communicated any of these feelings to your fiance? If so, how did he respond?
Be sure to reach out to people and not isolate yourself. You may find it helpful to gain different perspective.
I moved to Hong Kong 3 years ago with my current fiance. After meeting his friends and family I felt extremely inferior to them as I feel I can never live up to their status and their standards. I found help after he cheated on me after just 6 months of moving to Hong Kong, and was better for 2 years. However I am afraid I have relapsed 3 months ago. Currently I feel like I just want to be isolated from everyone including my family except for a few friends. I also have thoughts of reconsidering this marriage because I feel like his immediate family dislikes me, and don't I feel like I don't have the strengths of dealing with the situation.
Anyway, glad I found this site and hope it can help me!