It would help to have a little more information about your situation. For instance, what are the examples of his not putting you first over his best friend? I assume the best friend is a guy. My advice will depend on whether you’re super competitive and this dynamic of jealousy is going to extend to future in-laws and his time at the office, or if he’s really putting his best friend first as a way of avoiding intimacy with you and not feeling like his relationship with you comes first so he can avoid growing up. So, tell me more! 🙂