Sometimes, we get infatuated. It feels like love, but it has to do more with other influences than just the emotional connection that you have with the other person.
You met someone who seems great and you can't have them. It is in human nature to get jealous and want them more. When you are truly in love, you may still be nervous or a little scared but you would throw away the fear and do something about it, not wait almost 3 years.
If she felt the same way about you, there would have been enough doubt about her current relationship where it would have fallen apart with in a short time of her meeting you.
I am not saying that you aren't in love, I am just trying to look at what little information I have and be a little more objective than some of the other posts.
Summary: You'll almost always want something that you can't have more than if it were available.
I would cite regulation, but I know you will simply ignore it.
