How to not freak out about everything?

Well this is usually the other way around lol. But the first thing you can do is just dont over analyze stuff or a situation if its not something major or she's not acting like somethings a big deal dont worry about it. Or instead of flipping out over something try to calmly talk to her over dinner or something. Or if its something she does alot that bothers you try talking about the three most aggrivateing things you each do and if you can get past those three things you should be fine!