trust

Im over thinking and my boyfriend is actually faithful but i know his friends airnt hes a senior and im a junior and i know towards the end of the school year hes gonna want to go to senior week which i feel like im going to stress the entire week and worry about what hes doing etc... i want to go with him but i feel like he wont let me and i would need  to convince my parents ( itll be 3 months before my 18th ) 🙄 not sure how id convince them, any ideas? And how can i convince him to let me go... im worried and this is months from now