So I couldn't resist clicking on this article, "Why his 'bromance' is healthy for him (and you)." An excerpt:
As Tina B. Tessina, Ph.D. (a.k.a. Dr. Romance), psychotherapist and author of "Money, Sex, and Kids: Stops Fighting About the Three Things That Can Ruin Your Marriage" points out, if you cultivate a good relationship with your guy's best pal, you'll have an ally who can be very useful -- not in a mischievous way, but in a caring way.
I've had bromance envy on multiple occasions. Maybe I need to calm down.
From now on, I'll savor my role as the annoying third wheel who won't drink Natural Light.