I want to loose my virginity!!!

So I've been with my boyfriend for about eleven and a half months and we have both decided that we are ready to have sex, he's seventeen and I'm sixteen. The trouble is, our parents are really old fashioned and have no idea what we are doing and would kill us if they found out we were having sex. Neither of us can drive and our parents both work from home so we are hardly ever left alone. How can we have sex? Places? Any ideas guys? Xx