What Tal said seems clear enough to me.
However, what you have divulged is not clear enough to me because after 7 years, you should be able to be clearer about your relationship.
What was this last fight about?
Do you both see eye-to-eye about career, financial, domestic, children, and future issues?
What is it exactly that his family did that made him change the date for the wedding?
Has his family always been a catalyst of most of your arguments?
What does your family think about him and your future plans?
How did you meet and how do you both spend the time you have together (besides phone calls and messages)? Do you both enjoy the same things in life or do you let him make all the decisions and then complain about them later or just accept them?
Where are you from, where is he from?
What common plans have you already made for the future - and who is stopping this from happening?
We need to get deeper into why you are depressed and how long it has been since the last time you two shared a wonderful weekend together... So please, start taking notes and share them with us. That way we can help you better.
As Tal said, 7 years is a long time and you two should have bonded enough to know if you truly are the right partners for sharing the rest of your lives with. I need more history, so let me know what's really on your mind, OK..
Hope to hear from you again soon.