How can she judge you so harshly if she has never met you? If she hates everyone Evelyn knows then it sounds like the mother has her own mental health issues. Maybe she thinks she is protecting her daughter from hurt or danger? Maybe she is jealous of all her friends and you? Like she wants Evelyn all to herself? I don't know if you will ever be able to "fix" the mother.. If she is not even willing to meet you she may never be ok with you. Do you want to marry this girl? What will happen when the mother doesn't come to the wedding.. Do you think evelyn will cut her ties with her mom for you? Because I think if it comes down to you making a commitment to marriage the mother might threaten to disown her. Would evelyn walk away from her then? I think there are a lot of things to think about. And if you love this girl and are willing to be with her and take the risk that the mother might cause the relationship to end then I say go for it. Hopefully with time the mother will come to see how happy you make her daughter and she will learn to care for you. Best of luck to you.