I fully agree with the first half of your post. They are excuses to make me feel better about the situation in a weird way. I don’t believe he doesn’t tell me anything. He rarely even goes out and plays a ton of video games/watches them. He wouldn’t lie to me about those things and we are very open. His sister and I have had a wary relationship. In the first couple years of dating, Paul and I were in a low point and she I guess overhead the whole thing, defriended me of fb, actively wouldn’t like Instagram posts and is more friendly toward Paul’s friend’s girlfriends when we all hang out. It’s hurtful but extremely petty. Not sure what the solution for that is. I think it may be that we have very similar tastes and she feels a bit insecure about me spending time with Paul since they’re super close. But I don’t think it’s any excuse to act immaturely and hurtful toward me.