I doubt this girl has fallen for you based on the information you have provided me. When she asked you whether you were thinking of her, you shouldn't have responded with a "Yes." - you appear as too needy, and there is no doubt you are since you haven't had a girlfriend in such a large amount of time!
Okay, so you need some tips. My first tip, start playing a bit more hard to get, you are making yourself too easily available to her. Never let her know you are thinking about her and always be mysterious by not answering her questions directly. You may ask: "Axcell, how do I not answer her questions directly?" Its simple.
If she asks you: "So what do you do for a career?" Respond with something such as: "Oh, I work in slave business. You know, import/export, etc." OR "I am a model, but I hate how these people are just using me for my body, I need a new job!"
Another example: "Lets sit here." You respond with "No, let's sit over here." (Pointing at a different place.)
Be a DJ, be a LEADER.
Okay, so you will be seeing her at church - that's great! If you developed a high amount of rapport with her, she should approach you when you make eye contact with her. Be a little ****y + funny with her, game her, and ensure that she has such a great time that she will want to spend more time with you elsewhere. (Possibly movies, etc.) Do NOT ask her out until she gives you some more IOI (Indicators if interest.)
Be calm, I don't see how you can even think about asking her out this early, unless you missed out pointing vital information in your post..
Anyway - I hope I helped you out. If you have any specific questions about what I posted, or anything else, feel free to PM me.
Axcell.