Am I jealous or is there a problem?

Hi guys, I have been married for six months and it has been the greatest time of my life. However, in the past I had two boyfriends, and my best friends at the time tried their best to destroy my relationships. One of them introduced her ****ty friend to the guy I dated, gave her his number, and they got drunk and had sex. Consequently, I have been unable to trust anyone fully until now. Recently we were invited to the house of my husband's female friend for some pizza and fun time in a nearby park. She was initially his friend, but after we have dated for a year, she became my friend too. Anyways, in the middle of the eating time, she stood up and asked my husband to go far away from me and another friend to take pictures of her blowing bubbles. Then they exchanged and she took pictures of him. I felt left out because they didn't say anything to me and the other friend, and left us there for almost half an hour watching them playing with each other and laughing. My husband said he was just excited to take pictures of the bubbles, but she kept asking him to take pictures of her (with her camera) so he couldn't stop. I didn't know what to say, but after that she saw that I was upset and still posted those pictures on Facebook, tagging my husband in. She even said later that my husband is the most special guy. I wouldn't have felt this way, if before we were married, she hadn't usually asked my husband to come to her house for dinner and cooking. They were in a group of three and the other guy is my husband's close friend who told me jokingly that he envies our love (later the mentioned female friend told us that he felt lonely that my husband couldn't spend time with him as much anymore). Even when we were in a relationship, the girl and that guy usually organized dinners and invited my husband to come and stay until late. One time they even went for a night walk at 1am and came back at 3am in a group of two guys and a bunch of girls. I was also left out of those events even if one was at my husband's place. Back then I was not jealous and didn't think it was a big deal. Nonetheless, after the pizza dinner in the park, I felt something wrong was going on, and I also knew the girl wasn't the honest type of people (she lied to us about this one thing that she told everyone differently before). I'm so sorry for my long text, but my question is whether my worries were reasonable, because my husband said he would stop communicating with her (they are working in the same company) or even sitting together in the same bus (we live in Helsinki so a lot of people use public transportation to commute instead of having their own cars). Or am I too jealous? Thanks so much guys!

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