<human>: Give me the gist of the text in a nutshell

I'm a 22/F and my boyfriend is a 25/M. I play on a local sports team and he is a referee for that team-which is something he did for us to be able to spend more time together.

Several days ago, I noticed he was actively messaging on Facebook on his phone, and so being the naturally nosey person that I am, I asked him who it was. He said it was the coach of my sports team, who is also a female. I asked if they were talking about the upcoming game and he said yes, but as he scrolled up there were pages and pages of text. I asked him if I could read their conversation, and he said yes but was really hesitant to give me the phone. Long story short...they talk about a lot more than the game/sport. They talk about their personal lives, and say flirty things with each other, and there are even a ton of "smiling" and "winking" emoticons to top it off. At one point, he even tells her how much I look up to her, and that I need extra encouragement because it's my first game with the new team (I recently moved to another city to be with him), and that the extra encouragement will make me feel better because I'm so nervous. I recognize that he probably did this with good intentions in order to help, but I feel like he made me look weak. In a way, I feel like he humiliated me in front of her on purpose after seeing what else they had been saying to each other. Like I needed to be coddled by her because I'm a nervous little tit, apparently. 

Anyway, I am mad/upset about it. I feel like he has driven a wedge in between me and the thing I love most (the sport), and has made it weird for me to even go to practice because now I feel there is some sort of weird tension between the two of them. Maybe I am overreacting, but I still don't feel good about what went on. I feel like I can't share anything personal with him now because he will run and go tell her all about it.
<bot>: Boyfriend is having (what I feel are) inappropriate conversations with my coach on Facebook. This makes it hard for me to trust him and is also driving me away from my favorite sport