For ground rules, I'd recommend yes, but as few as possible. Trust me, if you have rules he doesn't like, he'll only break them. Especially rules regarding control of feelings. I.e. You can have sex with her, but no feelings.
Figure out what's truly important to you, what your needs are. If he breaks Rule A, will you leave him? That's a harsh, but good litmus test.
Because if he does break them, and you allow it, you'll have little to no say in how the relationships develop in future. And if he feels like the rules are there out of insecurity, he'll likely ignore them.
But, definitely make sure you're taken care of, by you.