Best friends and relationships

Michelle • I`m 24 baby Declan arrived 08/07/2017! I have 3 angel babies.06/18/15 and mono-mono twins on 06/27/16.
So I meet my boyfriend of 7 months thought who I thought was a friend a r work. This friend is his best friend since they were little. Turns out his friend never did like me and only gave me his friends number as a joke but didn't inform my boyfriend ( he didn't think he would date me). Well me and his friend worked within the same unit at a hospital he transferred out because of drama he was in. 
Well he has been coming over to my unit and telling people that I stole his best friend and that all I ever want is sex that I'm addicted to it. Well this was the second time he done it and I was tired of it. My boyfriend said to call him out on it; I didn't want to i thought it would cause drama. Well it did now his best friend is telling him he has to choose between me or him. 
Am I in the wrong here? When I asked my boyfriend what he was going to do he said he couldn't choose. I told him I could choose for him and break up with him he said no. Then he basically asked me to act like we broke up. I told him know ( his best friends text him and said I hope pin make that b**** cry when you break up with her. I said maybe it will blow over.
I just don't know what to do. I love him we talked about staying together for a while two years engagement four years marriage. 
Should I just make the decision for him or wait it out. He says he loves me but I told him sometimes love just isn't enough.
Opinions?!?!