Relationship Problem - Need Help

Hi all,

I really need help.

---Winter 2005---

-I met this girl at a class room and we work on a project together.
-We started a business together.
-I told her that I like her, and I told her that "overtime, the feeling will die down". I

didn't want to pursue her because she's Christian, and she told me that she only dates

Christian.
-Next morning, she sent me photo portrait of her.
-Nothing happen.
-We talked a lot about our personal past, but I still do not know everything.

---Fast Forward to current date---
-We've never talked about that day that I confessed.
-We still work together in the business that we started.
-I hang out with her most of the time because she's pretty my only friend.
-We really don't talk about our personal - especially - dating stuff anymore. I don't tell her when I went out on a date because I am shy, and she doesn't tell me a lot. She mentioned a little bit every now and then.

---Recently---
-I think she likes another guy whom is not Christian or maybe her ex-boyfriend of many years ago because she seems to occasionally mention him.
-The feeling that I like her pops up every week or so since Winter 2005.
-Since then I try to date other girls, but so far I have not found one.
-Recently I avoid going to her house to eat dinner cooked by her mom because I try to keep

distance. It hurts me to be close to her.
-Whenever she talks to other guy, I feel jealous.

---I am struggling if I want to tell her because:---
-I kept finding faults in her so that I don't like her.
-I kept telling myself that she likes only Christian.
-We're business partners
-I am afraid of her past that one day she might go back to her ex-boyfriend. Well her

ex-boyfriend is not in this country!
-My ex-girlfriend that I dated for 4 years got married, and I am happy for her. So I kept

thinking that if she likes someone else, I should be happy for her.

What should I do?