My boyfriend recently completely switched out on me and is acting totally opposite of how he acted for the first years of our relationship. He is rude and not the sweet man i fell in love with. what is going on with him?

He used to be attentive, kind, and respectful. Now he talks down to me, eyeballs the girls, doesn’t stick up for me. I just got accepted into nursing school and he is getting laid off from his job and will receive a large severance package. It feels like this has something to do with his behavior. what is up with him?