Depending on when you ask me and who is standing around I will either say that I know nothing about relationships or that I know quite a bit about relationships. In the interest of sharing a piece of advice that I have learned and I believe is true here is a little bit of wisdom.
Relationships are developed, and typically strengthened, by spending time communicating amongst those involved.
I realize that is pretty basic, but I feel like it gets overlooked. For a little bit of clarification, communication is not just verbal, there is quite a bit of non-verbal communication in a relationship.
There are no shortcuts, there are shorter routes, but ultimately anything worth having does not come easy. In other words, if you want to develop a relationship it takes time and work.