I've spent much of my life as a loner and now that I'm married and as a christian I should be thinking more of my wife and others than myself. How would you overcome this?
just as how you would like your wife to treat you and other people so must you treat others. the bible says do unto others as you would want them do to you. and i am sure you do not want your wife and or other people to treat you selfishly...right?!
One thing is knowing what's right, another thing is having the ability to do what's right. Pray to God to give u that divine enablement to always think more about others rather than yourself