GF coming home completely drunk after evening with guy friend

Hey guys, just a quick story and worries I [30M] want to share with you and see what you think about.

Yesterday evening, my gf [33M] of almost three years was invited to spend the evening at a bar with a friend she lost contact with for 10 years and just started seeing each other again recently. Met the guy, very nice and all, I was invited too, and other friends of him as well. I decide not too go in the end, no worries there.

At 2AM she comes back home completely drunk, trying to hide that from me, and telling me that no one else came and it was only her and the guy friend for the whole evening till the end. In the morning she is hangover af, cancels all her plans for the day, vomits, you get the point. Also to note that she stopped drinking too much because she doesn't handle alcohol well, so normally stops after one glass or two max. She also told me she smoked some cigs, even though she stopped (a bit before we started dating) and knows that I really dislike cigarettes and her smoking.

I am not worried she would cheat on me, but more worried that I cannot really trust her handling herself and even more worried that this guy would have a very bad influence on her... What do you guys think? Overall I find this all completely shameless of her, and I am a bit disgusted by her behavior, but I don't know if I am just petty and an ah thinking that?