Am I just being paranoid about my boyfriend and my roommate?

My roommate hates my boyfriend and thinks I should break up with him, but when he’s around she’s always laughing and talking to him like he’s a friend. Found out today after I left my apartment that she and my boyfriend talked for 30 minutes (he spent the night and I had lunch plans so I let him sleep in).

Am I insane for thinking this is weird? I don’t like them being alone together but I don’t want to seem controlling or insecure by confronting either one of them about this.

I’m tired of her telling me to break up with him/shit talking him to me and then her acting so fake around him. What should I do? Is this a toxic friendship that I have with my roommate or am I just overthinking things? It’s so annoying.
Am I just being paranoid about my boyfriend and my roommate?
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