I became a gym guy. Wasn't interested in the time commitment or expense of cycling. Swimming is boring. I do weights and cardio equipment. Keeps me thin and toned. People tell me I look better than when I was running.
Dealing with the emotional side was hard. After a knee cartilage injury rendered me permanently unable to run, I went through a year long DEEP depression. As in, wishing for my own death. I cried every day for months. I trolled letsrun hard core during that year. You wouldn't believe some of the stupid stuff I posted during that time. It was a period of complete misery.
The only thing that helped emotionally was the passage of time. I slowly came to accept that I'd never experience my passion again, and started to move on. Don't get me wrong, I still miss running and would go back in a second if I could, but I accepted my fate and moved on with a new form of exercise. Eventually, you adapt to your new normal.
It sucks; I feel for you.