I guess he wasn't your "dream guy." I suggest you forget about this fantasy of a "dream guy", as there will be no perfect person, because people aren't perfect, and can never be exactly what you want them to be. I suggest that you focus on a fantasy of being with someone and creating experience together--visualizing specific experiences and paint it all with positive emotions. Leave it up to the "higher" processors to bring in a person who his willing to cocreate these experiences with you. After all, that is what a relationship is--a creative union. You make experience together. It's a space in which both people give creatively.
Make sure you're in very relaxed state when you do visualize. Research the alpha state, or the state of self-hypnosis. It's very powerful when very relaxed.