Can I save my marriage? (Can you help me?) (Sorry is so long...)?

First of all I'm sorry ... It does sound like she needs some space to think things over. Sometimes in life people do fall out of love , I'm sorry to tell u this. It could not even be you , maybe it's her she isn't in the right place in life where she would like to be. or maybe she just needs a little time to think and decide what she wants to do. Give her space , leave her be for a little while and than see what happens ...No matter what she decides just know it's not your fault life and love are full of surprises (good and bad) it is not like science ....calculated and precise. Hope this helps and good luck to u :)