Would you feel uncomfortable with this?

My boyfriend has a girl best friend coming from Washington, and she will be staying at his house (he lives with his parents) this week/weekend. I guess I feel a little uncomfortable because I haven't heard from him for 4 days and this weekend is my birthday.

They've been best friends for a long time, and I want to respect that. But idk I just don't feel right for some reason bc he hasn't texted me in this long.