Does any of this sound gay to you?

I'm bad at titling my posts. And this is kinda difficult to express but I'll do my best. Here we go: There are these two guys at my campus gym, right? Let's call them Ben and Mickey. They always come to the gym together, work out together, leave together, etc. I concluded that they were brothers. I only noticed them because I thought Ben was attractive as hell, and even though Mickey is not my type, my gaydar went blaring when I first saw him. I noticed that they had this dynamic where Mickey looked to Ben to decide what machine they would use, how many sets they would do, etc. I avoided them because I didn't want to befriend a potentially straight man (Ben) who I had a crush on. But one day, they were using a machine I needed. When Ben saw me waiting, he came up to talk to me, asked for my name, complimented my physique, and asked how long I'd been working out. Nothing too serious. Of course, the idea of my crush approaching me to talk to me made me a little giddy, but I also knew he was likely straight and just being nice. So I didn't read too much into it.

From that day on, whenever they saw me at the gym, they would smile, come up to say hello (especially Ben) and chat for a bit. I got a little comfortable asking them about themselves. They told me they were not brothers, that everyone else had that misconception. They were strangers who happened to meet in school years ago. They joined the same frat, decided to leave at the same time, and are now roommates. They also happen to belong to the exact same groups on campus. I've seen them outside the gym about five times and they were always either walking or driving somewhere together. Idk much about straight culture, but is this "normal"?

Just to see what would happen, I asked Ben for his number. He gave it to me, and we text sometimes mostly about working out and things like that. It never goes beyond that. Idk if that's because I've never taken it beyond that, but I'm not going to risk that. Again, this could be a straight man.

I guess I have a few questions for you, bros? Does their dynamic seem hetero to you guys? Am I seeing what I want to see? I usually mind my business about other people, but I have no gay friends in this town. I plan to ask them both out for drinks this weekend anyway. They seem like cool people and I would still befriend them if they turn out to be straight, but my curiosity still lingers. I guess I have no specific line of thought. But what do you think of all of this? Do you think it's safe for me to try to get to know Ben more? On the other hand, do you think they may be an item? What would be your move?