have a meaningful relationship

So this is kind of a funny one. I must sound heartless, I’m in my 20s and yet to have a relationship which I consider to be meaningful? Well, my relationships with people have always ended badly with me wondering, what went wrong. For once, I would like to have a relationship with a better meaning, one that allows me to remember all the positive aspects and what was right about it. I know this will require a lot of effort on my part because it’s not always easy to let people into your life, but I suppose that is why it’s on my list! I’m not searching for a lifelong partner, just something more fulfilling.