Post breakup suggestions

My girlfriend broke up with me today after a 11 year old relationship. I (28) literally cried for the first time since I am on my feet. I couldn’t think this world without her. Off course I still love her , and I will never call her or stalk her and that is for her best. Please help me out here , what to do to get over this. Today was the first day and it went like a year without her.