I have a crush on a married man. Help?

I was a totally plain jane, and I mean it. Months ago, I noticed a guy (Mr X) who always eat at the same dining place with me. It was a love at first sight. As time goes by, I found myself deeply in love with him.

I change the way I looked (changed my hair style, my clothes, my diet and even put on make up). Finally, I got a new look that I am happy with. Guys (be it someone I know or stranger) started to approached me. This boosted up my confidence. Mr X and I always exchanged glances at each other in the dining place. I noticed that he does wear a ring, but it doesn't look like a wedding ring at all.

So, one day, I approached Mr X, and asked if we could be friends. He said that we can be friends, but he told me that he is already married. Feeling depressed, I said ‘fine’ and walked away. I know that it was rude of me to walk away, but what could I possibly do? It wasn't easy for me to approach him as I was a really shy and timid girl.

So, a couple of days later, I saw him and I apologized. He accepted my apology. Since then, I never see him at the dining place anymore. Why is this so? Could it be that he is trying to avoid from me or what?

I do want to forget about Mr X, but it is really hard. If I were to see him at the dining place again, what should I do? Should I approach him and say 'hi', or do I pretend like I never see him at all? Please help. Your advice will be appreciated. Thanks