am I ready for sex again?

My boyfriend and I have been together for over a year and I love him with my whole heart but we don't have sex. I can't even think about life without him but last night he said he doesn't want to wait until marriage and I think I do.
I've had sex before but have a crazy obsession about numbers and the fact that I feel like a whore (I've been with 5 people since I was 15, now 20, all boyfriends - but shit ones) but I haven't had sex since I was 18. Can anyone help me with this??? I don't want to go into double figures ever in my life and I'm scared to increase my number even higher. I need advice thank you X