In general, we don’t rush important things, correct? Something that is life altering like this should make you want to take your time, no? Rushing may lead to things that may not have revealed themselves yet and that you may not enjoy. Also, I don’t believe his reasons to want to go slow are unwarranted. Please put yourself in his position. If you had been hurt in (a) past relationship(s), would you want to rush back into one or also not want to be guarded?
For now, I suggest you not worry about the future. Doing so will only distract your mind and conjure unhealthy thoughts when you’re spending time with him. If you are meant to be, everything that is supposed to happen will happen. If not, do not worry as no experience is ever a loss. There is always something to be gained from them. Don’t allow yourself to dwell on things that you’ve no control over, simply enjoy what you’ve been given. It’s rare enough to have been allowed such a spiritual experience, don’t waste it! 🙂
Al