Strict parents and dating

My parents are very strict even though I’m about to be 16 in a few days. I’ve had a boyfriend for 9 months and of course it’s been hidden from them. I’ve asked them to have a boyfriend and they look at me like I’m crazy and when i ask why could my brother have one they say it’s because he’s a boy. My boyfriend has been some what understanding but he’s always putting pressure on me on when we are gonna see each other and it’s causing me a lot of stress and not to enjoy my summer. I really don’t know what to do because of course i wanna be with him but i feel like it might be too much for him and he might get tired and leave. We only see each other like once every two weeks or so. I wanna see him but with my parents it’s literally impossible to make up a easy lie. They don’t let me go out with friends, shopping by myself, the movies, no people over, nothing!