DON'T DO IT most women can not deal with this type of relationship without suffering major self esteem blows.
If you must make sure you maintain some space and so should he.
#1. No sleepovers. Overnight cuddling is great but it can confuse things. No matter how late or even if daylight is breaking leave. This is not your man man and he should'nt get to have all of you.
#2. No excessive calling. He calls you, you call him back. You call him, he calls you back. No repeaters..don't be desperate..don't chase..don't act like he does'nt know what you want when you call..that should be understood.
#3.Don't meet each others family, friends may understand, but family is another. You don't want to be out on a real date and see his cousins or aunts and they confront you or later confront him and he or you have to explain
#4. Don't borrow money or recieve money or any elaborate gifts because that can really complicate things.
#5. Don't loan money either he is NOT YOUR MAN, you may feel mutual respect but money makes people act funny. If you don't believe me,spend a afternoon watching court TV and count how many women loan men money and when the judge ask "Are you two in a relationship" She says "yes" and the guy is only too quick to say "It was just Sex..your honor". Don't loan, or give any money.
#6. No double dipping..A friend's with benefits relationship should only be with people who are both single and looking. If you have a boyfriend or meet somebody great, let your buddy know and end it. If he has a girl and you just want him physically STEP OFF that's nasty and people could get hurt or something worse. Let him know while he is dating other women please protect, and inspect. Because you don't want nothing but Love