Okay, it is very good to use vocal prayers, and we should pray vocal prayers, especially the holy rosary (which is also mental prayer). What you should do is pray a certain fixed number of prayers at morning and at night - and DO NOT exceed this amount; pray your rosary, but do not exceed 15 decades each day, unless something extraordinary calls for it; pray ejaculations from your heart throughout your day, and only from your heart. DO NOT do any of these prayers for any bad reason like your wanting to be seen as good by God (as you have said); pray to honor and please God and to get closer to Him, to seek His assistance, to save souls, etc… When you begin praying compulsively, STOP your praying and put yourself in God’s loving presence and ask Mary to help you pray the right way. Do you think you can give this a try? God bless you.