Idk what to do🤦🏻‍♀️

So I need to vent and get advice from none biased people😁

So I’m 17 and I’ve been “secretly” dating a guy for almost 3 years now. The reason secretly is in quotations is Bc my dad has found out many times and made us break up many times. My mom has always known and she’s never had a problem with him and she even met him. So my dad is really religious and believes in sex at marriage and that your body is a temple (which I agree with). He also had a deep hatred for my boyfriend because he think he encouraged me lying to him about our relationship which he didn’t. In January he decided to meet my boyfriend but he didn’t know we were dating or that we are rn. So I I introduced him as a friend and he likes him now but still de won’t let us date. I’ve tried to have conversations with him and he’ll just say “you’re too young” or “no you need to focus on school like your cousins” or “no you need to wait until you find your husband when you’re older” but I don’t want to wait for a husband I’m too young!!! On Thursday my boyfriend had gone to the pool with us and he told me I needed to speak to my dad bc it’s time we stop hiding and actually be able to go out without him being on us but idk what to say or how to say it.😭 i also have an obsessions with wanting to get my nose pierced and he said no but he let my brother dye his hair yellow and he’s getting him a computer and me? All I want is a pierced nose and to be accepted with a boyfriend. What should I do?