You are how old?
You have been together for how long?
You've got common interests in music, literature, family planning, gastronomy, future goals.etc?
If your family told you to jump off a cliff, would you ask which one?
Have you told your family and friends what you've been going through since you met her or are you both putting on a great act?
What exactly was the reason you proposed to her? Is she a great cook, funny, does she have a wonderful personality and smile?
When you talked and you told her what was 'missing', did she also tell you what she was missing and did you listen?
Do you both have careers and goals, or do you count on friends and family to guide you every step of the way in your life?
May I suggest you write a list of all the pros and cons of this relationship and then without your family and friends, figure out exactly what it is you want in your life.
No matter what your choice, get back with us and let us know exactly how you are feeling right now. And, if you don't want to answer the above questions on this post, at least be honest with yourself and think about them.
Good Luck.