advise for ones who restricted in love by parents

ok well like I explainded in my what 3 other advise messages that I still didnt get really much help with im 16 my boyfriends 19 totally legal in every way but my mom refuses to let me see him and be with him so we sneak.. but now shes got my band instructor keeping an ieye on me so there is no way I can see him… my mom think she has upper authority cause im a minor and the law is more under her favor than mine im 16 theres notheing I can do legally I feel really not safe under the laws cause I feel 16 year olds have no right to them selves unless they are under emantipation which is kinda hard to get.but there is no reason for her to hate him other than his age … and when he was truthful to her she shot him down and she still never let me see him like the first two months when we were just friends she loved him…she put me under a false contract she gave me two options but the both ended with a pfa I though a contracts supposed to be an agree ment you get what you want under guid lines and she gets what she wants.and as soon as we were dateing thats it she started hateing him for no reason finding every possible reason why he and I shouldnt date but he hasnt physically harmed me or even did anything I didnt wanna do he was a pure gentleman to her till she pushed on his buttons and we had to rebel =[ its not fair I love him so much but every time I talk to her about that or him she just says oh hes just a fling hes an a** blah blah blah then she finally says I can date him in two months if we were good but why would you wait to months its not fair he turns 20 in two monthes she was just gunna screw over so yet again we rebeled sneaking out to see each other I need something legally that would end all this where im happily able to be with him openly and stop my moms crap once and for all im begging can anyone help me !!!