Maybe if you can concentrate on improving the main problem that is driving your wife nuts you can make her feel like you are willing to work toward resolving issues that drive a wedge between you and cause unhappiness. My husband and I have been through the wringer with one another in our years of marriage. When we have had our darkest moments and I have been sure that he was ready to walk out of the door, I have prayed and asked God to help me resolve the problem at hand. Its strange how it can work, but I have gone into the bedroom while my husband is in the living room saying he was ready to walk out, prayed, then come out of the bedroom and he apologizes out of the blue. You will feel more secure as you put one foot in front of the other and walk through your life.
Maturity brings a sense of greater security.
Just take life one day at a time and do what you know to be right each and every day. Try your hardest. Good luck and hang in there - it will get better with time. She told me her father was really strict and didn't want her going out with anyone. The next week she went out with one of my friends.