I think it is little different for girls and the guys. I haven't heard anything from my wife of 6 years about 'scary feeling' or 'getting scared' till now....but hell, I was scared like a pig being slaughtered !! As far as I can tell, life will take a drastic turn after your marriage... There will be less freedom when it comes to 'what you want to do' or where you want to hang out...but there will be things to enjoy...like cooking (trust me...you will enjoy it together !!), watching movie in your living room instead of in a Theatre (that will sometime be a Hindi movie), taking a long walk in the saturday morning in the beach and so on... I am sure you had done this with your GF but it will be different with your wife...and it will be different when you do the same thing with your pregnant wife or with your family. Is it good or bad ? I don't know. It all depends on your perspective... and what you are looking for. I am happy because I feel that I was done being wild and untamed... I was ready for more subtle and serious life. That definitely came after my wife...and the kids :-) Good luck and hope it will give you some insight of what might be coming...