What's the difference between a healthy and an unhealthy love relationship?

I was at a love addicts meeting tonight. I’m a newbie, so I don’t know what’s going on. I asked, “what does healthy love look like?” The room erupted in knowing laughter. I guess that’s the one hundred dollar question.

Since I had also asked another question—what’s wrong with looking—everyone chose to answer that instead of dealing with the big one. So I have no answer. Thus, I turn to you, my faithful jellies, to tell me the answer to this question. This is not about what is love. It is about what a healthy love relationship is like.