Why am I getting tired of my boyfriend?

We are two months into being in a relationship. He works with me but in a completely different department. We hardly see each other but we do take our break together. So in a sense I do see him everyday. We go on dates every Saturday but it's always dinner and a movie. There isn't much to do in my town or his. But I feel bored and have actually put off seeing him today. I don't feel good but still I don't mind not seeing him today. A month ago, he was texting this girl (she sent nudes and was flirting with him) and was entertaining it even though he didn't send nudes or flirt. But since then, I backed off emotionally and don't want to get too close. I also have depression and anxiety so I don't know if all of this is because of that. What's happening?

Why am I getting tired of my boyfriend?
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