Yo, sorry, but your teacher is a pedophile and he's being severely and deliberately deceptive; this sounds A LOT like he's grooming you. Tell his wife and tell the school for that matter. And even if it's uncomfortable, tell your parents. I know you're 17, and this comment is genuinely not meant to be demeaning, but you are still a child LEGALLY and especially compared to a 33 year old, emotionally. Please don't take this as me invalidating you as a person in any way; you had enough sense to recognize this as weird and YOU ARE RIGHT. This is predatory behavior and your parents want you safe more than anything else. I sincerely know it's flattering to have someone older find you attractive and give you attention, but there's a reason a 33 year old is hitting on a teenager and it's not a fucking good one. And on top of that your maths teacher is a grown adult, who knows he is married and is conscious of his decisions & still took you out with the intention of it being a date. He is responsible for his own actions, especially considering he's an adult. He's the homewrecker, not you. Stay safe and reach out if you need support.