Do exactly that , she wants the best for you at least thats what all mothers say , usually its mixed with i know what i consider best and so on , but at the end of the day she is not you , you decide when to have a gf when to have a wife and when to have kids , would she rather you jump into a relationship head first and then have another child growing up without both parents? these things you can say to her , and the less you interact with her on the subject she will understand i presume its not something you want to discuss