Husband don’t get over ex?

My husband is obsessed with his ex, but any time I try to talk about it he just get angry and tell me I’m crazy, he still have his old chat with her, even with D**k pics, and other pictures and videos of them having sex and threesomes. I feel really weird cause this was not the man that I married, oh well not the one that I knew, in those texts he just seems to be super freaky, he even texted her that all, all the woman that he had dated were “boring AF” that she is the only one that make him “crazy”, he even made a song about her, and some months ago he told me that I’m “basic” at sex, so I really feel like shit. Is something that I’m creating on my mind or he really seems obsessed?
Husband don’t get over ex?
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