Underage Sex?

So I'm 15 I've been going out with this 16 year old guy for two months. I'm aware that it is illegal as I'm from the UK but we have discussed it and we are both ready for it. He said he wants to but respects that I'd like to wait at least a month or two because we haven't been dating for long. I've always been quite a horny teen lol, what are all of your opinions?