Girlfriends (25M) male friends (24-26M) make me uncomfortable

I 24M have been with my gf 25F for 2 years now. She's always been quite social and has quite a few male friends which I'm fine with and have been supportive of her hanging out with them without me/without ever meeting the guys

I went to her best friends birthday party last night and I feel as though some of her actions were quite disrespectful towards me and our relationship I'm just wondering if anything below crosses anyone else's boundaries?

Whenever she was with me, everything she said and did was perfectly fine - even if it's a bit of a risky joke Idm it cos at least I'm aware

However, as soon as we chat in separate groups I saw her vehemently walking across And pointing at another guy and they both stepped out of the group together. He then had his arm over her for a while then was pushing their cheeks up against each other. I was staring at her throughout and she'd seen me that I was looking uncomfortable with it. For context - this girl refuses to kiss me in public if too many people are around and flat out refuses to kiss my cheek as I have a beard. This guy also proceeded to avoid me for the rest of the time there which has further fueled how I feel about this.

We were also speaking in separate groups after so she thought I couldn't hear what she was saying. One guy she knows then proceeded to make a joke saying she 'sucks off the firm' she works at - which I would think woild be disrespectful in itself. She then proceeded to reply that 'she only does that with her boss' which I heard and was upset about - she'd previously got upset about me making jokes to her that my boss is attractive (strictly as ragebait) and I refrain from any joke of the sort now, given that + the fact that she thought I couldn't hear it so it's fine, I feel like it's quite disrespectful to me. She has also previously made jokes to me that she thinks her boss (50+ M) is attractive- I don't mind that if it's between us but comments outside the relationship I feel as though it's very uncomfortable for me

I was also speaking outside with a few other guys (24M) and (25M). I'm aware that she's friendly with these guys but at one point we were talking about how one of them is quite attractive so have a few

girls who follow what he's doing quite closely. The other guy proceeded to make a joke but accidentally started saying her name at the start and went 'Xxx (the first half of her name then stopped saying it as he realised I was there), all of your girls are definitely into that'. I feel like this has brought some doubt into my mind - clearly she's not as respectful about our relationship with her male friends as I previously thought she was - now I'm wondering how far that actually goes given all of her friends are comfortable treating her like this, almost as if she's set the precedent that our relationship isn't serious at all.

TL: Dr My gf was touchier with guys, made uncomfortable jokes when she thought I could hear and her male friends make jokes as if she's into them. Did this cross boundaries?