warning may be contrary to popular views!!
I welcome you to hondastyle and it's nice to see a fellow Christian around here
I think you really need to be praying about this and looking to God for the answers. If he really wants you to be seeing this girl then things will work out. That said here are some more insightful thoughts of mine on the issue at hand. There might be a few things going on here I'm not to sure about but I'll try to give it to you straight.
I think you really need to question the actions you might take:
1- You wait for her
2- You tell her how you feel in hopes she feels the same way and boom your dating
3- You do nothing.
I think you should do #3 as hard as it might be and let me get around to that by talking about 1 and 2.
Outcomes for #1
A- In 6 months she breaks up with her bf and starts dating you. There is a high likelihood that you will get involve with a girl who doesn't know what she wants and you'll be strapped in for an emotional rollercoaster that you never signed up for.
B- What is more likely is that she wont break up with her current bf as they've been seeing each other for a little under 2 years by my calculations. This will leave you waiting for her to come to her senses and possibly missing the girl for you. Or she will break up with the bf and start seeing someone other then you.
Summary for option #1 You either end up dating her only to find out she's to messed up to be in a relationship or you never end up dating her.
Outcomes for #2
A- You tell her how you feel and she says she would rather just be friends. No harm in this but the fact that any relationship as friends will now be strained because well girls lie and you can never be just friends when one likes the more then the other.
B- You tell her how you feel and she breaks it off with bf and starts seeing you. Big no no because you just broke up a relationship.
Summary for option #2 Telling her only leads you down a path of complications, with or without her as your gf
Outcome for #3
Only option- you keep it to yourself and pray about it. If God wants the two of you to be together you will bump into her just like you did at the gym a year or so down the road. This time she will have been single and realized you are the man for her. Or if she's not for you time goes by and you get over her and set your eyes on another girl.
Summary for option #3 Keep it to yourself in hopes that your wants and desires don't over power what God has in store for you
I would think really hard about how you've been the one who has been seeking her and not visa versa. It would appear to me that she just thinks of you as a good friend. Possibly she likes the attention that another man gives and there are a lot of girls out there that do stupid things for attention, one being leading you on.
Peace
Rob