Boyfriends and things

I am kinda confused tbh I don’t know what to do I have been speaking to this guy for 6 months now and we spent a week in Italy on a school trip together. We have also met up a few times like going out to lunch, the cinema and stuff but it is getting a little more serious. You see he knows I like him and stuff as I have told him but he doesn’t want anything serious which is fine. But he want to go further and I have never kissed anybody and I am a little bit nervous and he wants blow jobs and stuff and I think I am ready for that but he asked what I would want him to do to me but I am very self conscious with my body. I am not sure what to do I want to be confident but I just can’t be for some reason I need advice