Don't you have a bestie that's a guy, Thundar? It's like your best friend and you're super close, but there's no sexy times involved. If they need a hug after salting their beer with their tears, you aren't shy about giving them one. It used to be considered unmanly to do that crap, talking to your buddy for hours on the phone or hugging it out if he's having a bad time. It's like a lot of girls have the Gal Pal to talk to, and some guys have the Bromance Buddy. Rhodey and I flip each other shit all of the time, but we've thrown down with some hugs. I have a Bromance with Rhodey. Even Pep knows it.
Sometimes there's girl and guy Besties who are close like that too. If they take a trip to Pound Town then that's not a friendship, but more a friends-with-benefits situation (trust me, those never work out) or you're in a hot and heavy relationship (and a breakup leaves you without a girlfriend AND best friend). You gotta have more boundaries there or things can get weird. And also, any actual girlfriends get suspicious about a guy being besties with a girl. So just no.
It's got step by step instructions on what a bromance is and what to do with one. There's a Question & Answer segment at the end so you'll know if a bromance line has been crossed.