Uhm...That's like way confusing...It took me a few read-throughs to understand what you were saying.
You might want to explain to the friend that told you about your friend and your bf, that you want to spend equal amounts of time with them. Then, sit down with the other two {the two being the bf and the first friend} and have a talk with them. Explain the situation, but don't mention the second friends name, and tell them both that you want to spend the same amount of time with all of them...And that if youy do end up spending more time with one over the other, it doesn't mean that you don't like one more than the other, it's just the way things worked out.