Kinda need help lol

So I'm 17 I've never had a serious boyfriend, my parents don't like me dating. The most Ive ever done is kiss 3 guys but I'm talking to this guy rn and he keeps trying to get me to do more with him and it makes me kinda uncomfortable. I've already told him that I don't want to but he keeps pushing me. So he basically said if I wont sleep with him I have to give him head but I really don't want to. I feel like I have to get over my anxiety about it and just learn but I'm really nervous. What do I do?