Scorpion male and leo female?

Hello, i like a girl who is a leo female, i don't know why i liked her.. she currently studying the same class as me, i am in college by the way.

At first, we normally glare each other eyes, because we never know each other yet and didn't talk much. After few weeks has past, we started talked alot of stuff, like something we have in common. Of course i smile and glare her eyes sometime without saying a word. At first, i saw her.. suspect she do alot of naughty, fun, crazy thing and i was right all along being er... dectetive?? 😛 Anyways.. i found out she got a bf cause my other friends asked her and i was around 3 feet away from them, i was doing my assignment by the way. Then i...started to feel pain on my chest, something very heavy, i didnt want to know she got a bf or not, i try not to ask her cause i just want to think of her as single. After half a day, i didn't do anything just listening some sad songs, damn my emotion! Then my dear loyal friend consulted me.. encourage me and given me hope, it worked.. he is one truly loyal friend i got.

I don't know why leo's female when i asks her about her bf, she just give me an incomplete answer. Even some of my friends asked her, the answer is still the same. I did ask her some personal life question, she doesn't give me an answer. =/
Plus everything i asked question and all she does is.. answer a question i asked. Is like a Q&A section with her...

Okay, heres the part where i don't understand her, she keep on bugging me and teasing me sometime and i totally turn her teasing joke into something more funny! Yea.. i am a funny guy.. whatever i talked with her i always try to make her laugh, sometime it work and sometime she just..ignore me or she tell everyone of my classmate and we all laugh together, hey that joke is was suppose for you.

And, sometimes i walked a little faster then her.. she suddenly pop out beside me and we both walked quite close. Is this her way being friendly? Or she has a thing for me? or she just want to feel the single feeling again.. *sigh* I really like her alot.. we know each other like for 2 months and i like her alot.. i mean alot.. but i can't flirt too much or she may notice i like her, she has a bf so that impossible for me. =)

What should i do?
I will of course focus on education first then "she".

LOL LOL omg, I'm not laughing at the situation, I'm laughing at the way you express yourself. It's so cute, I've never seen that before on here. You and your little details were killin me. 🙂

Anyways, good...do not flirt too much so she could know you like her, because what you need to do is stop unless you could get her from her boyfriend, i mean it works. But other than that, don't focus on someone when there is a strong possibility that they're not focusing on you. Maybe she likes you or maybe she just flirts, it's good that you ackowledge it and are not jumping to conclusions.Keep it that way and don't expect the best, don't expect anything.

LOL at that joke supposedly being just for her.. lol..what if she thought it was funny and wanted to share?