I find the whole trust issue a difficult one to deal with. I say this as I have trust issues myself.
You could say that as a damaged person you are within your rights to feel trust is something you hunger for, but you are always wary of anyone who purports to be suggesting that is how they feel about you as your past tells you things can change in an instant.
I think trust comes simply by being yourself. The people around you will see you for who you say you are. It’s the consistency of character that makes or breaks you.
Having been married to a narcissist, and completely oblivious to the fact of that is what she was, I am a slow learner, I devoted far too much of my life to running around pleasing her and eventually learning she was not a person I could trust and that damaged me greatly. Your partner should be your trusted companion, not a person who betrays that perception of trust my throwing in your face things you have said in confidence to her. I learned not to say anything nor show my feelings to her.
Since then those days I have worked on me being me. I have a wonderful friend these days who has a simple mantra I have taken on as my own. “Take it or d.”
Take me as I am or decline. The choice is yours, I am me and happy being me.
To gain trust in the opposite gender, I don’t think it’s all about what you say but more how you behave towards them. When they speak with you, it’s best to listen. They often just want to talk to you not feel you are judging them by expressing an opinion, which often the last thing they want to hear.
Listening is not easy. We all have opinions about what we hear, but sometimes it’s important to allow whomever it is speaking to you to have their moment centre stage. Knowing we are being listened to and our opinion valued does so much to build trust in the person we want to be closest to.
As for the future, I don’t know. Society is evolving at such a rapid rate and technology is allowing relationships to develop without actually being in the same room, space or country as the person you are engaging with.
I think the same principle will always exist if you be yourself and consistently do so by openly offering support, and encouragement trust will develop and become an integral part of any relationship.