i need advice!!

I'm 17 years old I have been with my boyfriend for 6 months we have not yet had intercourse he wants to but I don't want to at all I feel like I should just to make him happy is this right or wrong? I should I have sex with me him just to make him happy? I'm very scared I lost my virginity when I was 15 and I honestly didn't Carr about diseases or anything like but of course I used a condom now that I'm older I'm so terrified to have intercourse I'm so scared of pregnancy when I see girls my age pregnant it scares me to death I don't want that to be me. my boyfriend has everything in the world to make sure I don't get pregnant but honestly I really don't want to I'm over thinking it. what should I do?