He wants to have sex but Im scared to

Me and this guy have been dating for a couple months. In a relationship I think you should at least date a year or close to it before having sex. He’s leaving town for a week and he told me when he gets back he wanted me to come over so we can have some “fun”. He told me no one would ever know but I’m terrified being a virgin and him not being one. I’m scared he may leave after we do this. I feel ready but at the same time I don’t. Help?