Catholics only: i am really nervous about going to confessions tommorrow?

I am 14 years old going to high school in a few months and im really scared to go to cofessions i have sinned mortally sinned you see i have masturbated and i feel reeeeeaaaaallllly guilty i feel like crying i have done since i was 12 and i am ashamed of doing i have also confessed myself before and have not told a priest as in i have taken the eucharist with dirty hands which is also a mortal sin.... part of the reason i am really nervous is that the priest knows my family and i feel as if he might tell them or just think of me as some perv i mean it would be cool if i just went to some other catholic church and confessed myself to one of their priest because i wouldnt know them personally any tips on how to go about this and also if i do get the guts to tell the priest i am planning ti stop masturbating for the rest of my life