Wife [20 years old] is pregnant and very unkind to her partner, who is 22 years old.

My wife is 20, and I’m 22. She’s 8 weeks pregnant, and I know the hormones can be tough. However, it feels like every other day she starts an argument. Recently, I caught her with a guy she’s friends with, someone I’m not comfortable with. When I asked if she was hanging out with him, she denied it, but I clearly saw them together. She continues to lie about it, and now she says I’m making her life miserable and that I’m controlling her. The truth is, I don’t mind if they hang out, but I can’t stand the dishonesty. She even told me that I don’t want this baby and that I want her to have a miscarriage. I feel like I’ve done everything for her, and in return, she treats me poorly, often calling me a crybaby. When I cried in front of her once, she just made fun of me and called me names. She insists I don't understand what it’s like to carry a child, which I do. But then she tells me that I’ll be a terrible dad, and those words really hurt me. I often apologize for overthinking and reacting strongly, but she never acknowledges the hurtful things she says or does. I feel like I’m losing my mind. I believe I would be a good parent because I do everything for her; I cook, clean, and I’m the one researching how to be a good father. I read parenting books to prepare myself, while she just dismisses me and claims I will be a bad parent. I never get a thank you for any of my efforts.