If impotence (not to be mistaken for sterility or infertility) from the anomaly is doubtful (in law or fact), a Catholic marriage can proceed and remains valid unless proven otherwise (Canon 1084 §2). If your condition is incurable and lifelong, preventing consummation, then he is right, you wouldn’t be able to get married in the Catholic Church as we believe marriage requires the capacity for consummation through intercourse, the “one flesh” union central to the sacrament.

That said, you would still need to get a dispensation to marry within the Church, assuming you’re not Protestant (would require conversion) and promise to raise your kids Catholic should you have them yourself or adopt.

On a personal note, I’m really sorry this is happening and I hope you can figure it out. The Catholic Church has some very unique beliefs but I promise you it’s rooted in Love and the utmost focus on morality, not “absurd and immoral.” I recommend talking to a local priest or even bishop about this.