Need Help

So my SO and I have been together for 6 months and I moved from Washington state to Missouri 3 weeks ago. He is on his way to come live with me. There's just this small problem. For the last 2 weeks I have been having late night phone calls with one of my best friends who I've known for 6 years. I've had a crush on this best friend multiple times these last few years. And in these last two weeks of talking to him because he has talked to me more than my boyfriend I have recreated my crush. What do I do???