I would say the most important thing is to be yourself. If he doesn't like you for who you are, he's not worth keeping around. That doesn't mean you can't try to change a small habit that annoys him or that sort of thing, but fundamentally, you need to know who you are/what you stand for and he needs to respect that and be attracted to it--and vice versa.
As far as intimacy guidelines or physical boundaries, well I'll tell my daughter that God designed sex to be part of an intimate, ongoing, committed relationship which we call marriage. Since you're not actually my daughter and have probably already formed your own views on sex and physical intimacy, I'll just say that you should know what your boundaries are NOW before you are involved and know why you set them where you do. You are a lot more likely to make thoughtful, rational decisions about how you want to share yourself now than you would in a highly-charged passionate moment.
Finally, dating is supposed to be fun. Yes, in the end you may be testing each other out for a potential long-term relationship/marriage/parenting, but that doesn't mean the process is necessarily a serious and solemn one. Enjoy one another's company. Be friends to each other. Let the possibly future serious aspects of the relationship happen naturally, in time.
And finally I'd tell my daughter, if despite my own feelings on the subject, you decide to have sex before marriage, for God's sake get yourselves tested and wear condoms! I don't agree with premarital sex, but it's not worth dying for.
I wish you the best of luck as you find the man of your dreams, wherever he may be.