Search Results: text instead of phone

I don't normally post relationship stuff but I guess I'm kinda lost on this and for obvious reasons I can't ask my best friends as you'll understand in a moment.

So my boyfriend and I have been dating for just over 3 months and about a month into the relationship he became close friends with my best friend. They texted 24/7 and talked on the phone till 3 or 4 in the morning. I was kinda uncomfortable mainly for the fact that they talked more than he and I did. I brought it up with her and we agreed that texting was fine but phone calls should end by midnight between those two. As far as I knew she had respected that until the other night. I was texting him at maybe 11:30ish and having a separate conversation with her as well. He mentioned that they were on the phone but when I asked her what she was doing she hid the fact that they were in the phone. He and I had a very intimate conversation about an hour later and I assumed he was off the phone with her but I later found out that even though it was nearly 1 they were still on the phone. About 1:20 ish she fell asleep while still on the call and instead of hanging up my boyfriend stayed on the call for another 10 minutes before hanging up. Less than 5 minutes later he states he was going to bed even though we normally text until about 2:30 every night. Maybe I'm just assuming the worst but this while situation has me worried. Am I over reacting or do I have a right to be upset? Also, should I say something? To who? My beard friend or my boyfriend? Both? Neither?