My roommate is crossing the line regarding my boyfriend.

I'm feeling really confused about my situation. I'm a 27-year-old woman, and my roommate and friend, who is 28, has never liked my boyfriend, who is 32, since we started dating. She critiques even the smallest things he does and claims they are red flags. Whenever we have a disagreement, she insists that I deserve someone better. But as far as I know, having occasional arguments is normal in relationships. She also comments on how he doesn't visit as often as he used to when we first started dating. We live nearly an hour apart, and he's been swamped with work, which I believe are completely valid reasons for not seeing each other every day. My friend continuously compares his behavior to that of her unfaithful ex, but I've been dismissing her 'concerns' because they seem unfounded and biased. I trust my boyfriend completely. However, this isn’t the first time she’s tried to meddle in my dating life; after a previous incident that led to my heartbreak, we agreed she would stay out of it. Now I’m worried she's acting behind my back and it's going to put my relationship at risk. She even posted about him anonymously on a local Facebook page for people who think they might be dating the same guy. I asked her to take it down because I dread the thought of someone recognizing him and telling him, which would fall back on me. My biggest concern is discovering she went through his wallet and took pictures of things while we were at my place the other night. I found out because I reviewed camera footage. She has no idea that I know about this. If I confront her, it could lead to issues since we have to live together for another two months. But if I say nothing, I feel like I'm betraying my boyfriend. I really don’t know what to do.