u/Cute_Bison_2084

Hi everyone.
First I want to apologise for the mistakes but English is not my first language.
I(25f) and my boyfriend(33M) know each other since 7 years, but we are together since 2 years. We live together since the beginning of our relationship and the things are going very well. So last month his sister had married (for some context she was 8 months pregnant and the wedding had to happen very fast) and all the guests was 20 people and there was this girl „friend”(34 f, single) he was growing on the same city, house to house. So he doesn’t live in this city since he was 10years old , now she doesn’t live there either and they aren’t like besties but her vibe on the wedding set me off. This was the first time we saw each other(we live in a different city) and she was obviously avoiding me the whole time . So the things happened on the wedding reception and this was the situation: we were seated next to each other ( her, me, my boyfriend) and she was quite the whole time but then the salad was served and she started talking with him for his work( he is chef from 10 years) and start questioning him all kind of stupid questions that if she cared about she could have asked him before(What is your strange experience that happened to you on your work? Do you like it? How much guests are you cooking for? Wow and how much time you spend cooking for this type of event?) and all this with waving her hands around me while I’m trying to eat. At some point I was so pissed off that I stand up and just go to the bathroom, but after I returned she was waving her hands again this time with her glass of wine so I was just going to sit and she „ accidentally” spilled it to my chair without even saying sorry. So my boyfriend just switched the chairs and then eventually stopped talking with her without me saying something.
I wasn’t jealous, just annoyed because of her attitude (she act like I don’t exist) and her reactions while I was talking. She doesn’t talk with no other, except my boyfriend, even with her sister who was sitting next to her. The whole thing reminded me of times when I was at school and girls are always trying to impress the boys with asking some random questions and then admiring the basic answers.
So AIOR for thinking that she might have/ or had crush on my boyfriend?