<human>: My girlfriend and I have been together for 11 years now, and our relationship is pretty great most of the time. But whenever we're at a party (or any gathering of people) it seems like I'm always finding a way to make her upset. Whether it's because I'm giving too much attention to someone else; or because I'm rude with her without noticing; or because I wanted to go to a different party and got a little angry.

These problems never happen when it's just the two of us. And I know I'm in the wrong most of the time, but I always realize it afterwards, when the damage is done. 

Maybe the fact we're usually drinking in these situations doesn't help. I wanna know what can I do? I feel like I don't have control over these situations, they happen without me noticing them. What can I do to change? I really love her and I want to get things right.

Thank you for your help.

Can you give me the gist of the text in a nutshell?
<bot>: I keep making my girlfriend upset when we're at parties. I don't realize I messed up until it's too late. How can I change?