My friends guy or whatever he is.

So my bestfriend is with this guy, and I honestly don’t really like him. He never says hi to me ever or makes conversation. He just stands there and judges everyone. And honestly he’s like the last person to even be so judgmental. Well my best friend and him they both have a pair of 3 kids not from each other but my friend from her ex and he from two different ex’s. I’m a single mom of 1 child. I usually hang out and drink a bit at my best friends house but I never bring my son around I always leave him at home, and I’ve only ever brought around two different guys. I’ve been single for 7 months already, and I’m just seeing what I like, and my friends guy was judging me so hard because he’s concerned about the first guy I brought around. Like I’m such a bad person or basically a “hoe” but why does that even matter to him? I never made anything apparent to anyone that I’m serious with these guys, and neither have they. Like am I wrong? My bestfriend doesn’t care who I hook up with it’s just annoying that her guy has something to say about me all the time. Aren’t I allowed to date for fun?!