My boyfriend and I were part of a pretty small friend group before we got together. We all hung out frequently, but now that we’re dating, we mostly hang out with just each other. Though I enjoy being with my boyfriend, I feared that this would happen and our friend groups dynamic would be off.
Now, my boyfriend kind of separates me and our friend groups interactions with him. Recently, I decided to visit him in the afternoon. He had told me another one of our friends would be coming over too, which I was completely fine with. While we were waiting for him, my boyfriend started talking about how excited he was to hang out with our friend alone (exact words: “I was so excited to hang out with him alone, then you came over.”) Normally, I wouldn’t be upset, but he said this after I had already asked beforehand if I could come over and he seemed fine with it. Only when I was actually there, did he say this. I left because of this a few minutes after our friend came over. Does anyone think I’m in the wrong?
LemonVibe 
You seem like a thoughtful and mature person. Tell him that next time when you ask to be strait with you and consider this a red flag. Don’t get angry and say it calmly. Communication is important to all relationships.
Also, now might be a good time to pay attention to yourself. What are your hobbies? How about your other friends who may feel neglected since you two have been hanging out so much. Or finding a job to make some money. Volunteering for something you care about like at a senior center or cleaning your community or church camps… you get the idea.