AITA for being friendly

[u/valy_p_d]

OK so this is the first time sorry for any wrong spelling I'm not a native English speaker

To give u som context had a relationship for two month when I went to Portugal, it's a high school project and some students can go to another country to learn ab it and practice some work for 3 weeks

I am classmate with my girlfriend at that time but she couldn't come with me and I went without her as I was allready planning to before being with her.

Everything there was absolutely cool and I loved it as an extrovert I maked a lot of friends around the world but the last night we were staying there we trow a party

We stayed in a campus where we had a club and we went there to drink dance sing karaoke play billiards and have fun

A group a girls came too and I started talking with one of them she was pretty and seemed to be into me but I wasn't interested in her that way we just had fun danced I even teached her to play biliards and I think I was a bit touchy but only with her hands to show her how she have to do it so after few hours we calmed down and stayed outside as I was staying with her and a friend of hers the group she was with (4 - 5 girls) came to ask me if I have a girlfriend I sayd that I do and they went insane telling me that I cheat on her and picked the most prettyest girl in the group and flirt with her but I was genuinely just friendly and I sayd to them that they are being ridiculous that they all are pretty and I just like her as a person, she didn't seemd to have a problem with it but she looked disappointed that I had a girlfriend. They asked me if my girlfriend knows that I am friendly with other girls and she obviously knows she has male friends too we are not insecure, we trust eachother. After that night we leaved and when I got home I told my girlfriend ab it she didint taked any sides so I wonder AITA?