pls its urgent

pls am having issues house. I need an honest opinion. my boy friend and I have been dating and waiting for 41/2 years and am 18. although he has had sex before but for 2 years he hasn't because of me. recently he has changed. and our relationship is more of distance relationship. we are suppose to break( like have sex) tomorrow. a part of me really wants it while another doesn't. what should I do? pls