How to Gain a Girl's Trust. Trying to gain the trust of a woman you like is not always an easy thing to do. It's important if you want to end up dating a woman or have the chance at being in a strong and healthy relationship with a girl that you are able to gain her trust. Just knowing that you need to gain a woman's trust is not enough, though, right? You need to know how to make it happen, how to get her to trust you so that she ends up seeing you as a guy that she wants to be in a relationship with, Continue,