I decided to stop eating meat over a year ago. It was a personal decision mostly based on ethical, rather than health, reasons. Like you, I loved meat (especially steak). I thought it would be difficult to give up.
Surprisingly, it has been very easy. I am not very good about making sure each and every meal is healthy, and I'm not terribly good about eating fresh veggies, but I haven't been especially sick or weak...and I do think about trying to incorporate a little protein each time.
What I do eat:
I love pastas with alll kinds of sauces: pesto; garlic, oil and hot peppers; bruschetta-type sauces. I make pizzas with garlic, grilled onions, sliced tomatoes, feta cheese and fresh basil; black beans and rice; broccoli rabe with pasta, hot peppers, garlic, olive oil and good grated cheese. I like veggie burgers that are not faux meat. Surprisingly, in a pinch, Burger King has a good one! (I try not to think about the fact that it is grilled on the same grill as the meat). There are also many yummy soups to be bought or made....
Eating out: ethnic is better/easier!! Especially Asian...almost anything can be made all veggie or with tofu. I love tofu in sauces, and while I always thought I preferred fried, I'm finding steamed soaks up the sauces better. I LOVE Indian food, too, the spicier, the better...plus, lots of it is all vegetarian. We have all-vegetarian Indian buffets here...yum!!
In general, if you love variety and spice in food, being vegetarian is quite an adventure. If you tend toward bland foods, though, I suspect it can become boring eventually. I eat dairy so I get protein through cheeses and yogurts, and occasionally I'll eat fish (which feels a bit hypocritical to me, but I do it anyway, in a pinch...).
I also have a rabid sweet tooth, but that's another story...

Hope this helps...