Girls!
Let's say you see this guy often every morning, for a month, in the bus AND metro... well, you guys take the same bus, which leads to the metro, then you guys take the metro, then you get off at the same station. Not almost everyday, but at least every other day. The guy is about your age, and is not bad looking.
What if one day, the guy starts smiling at you? And also, he'll try starting a conversation with you casually. Would you girls get scared? What would be the best way for the guy to introduce himself?
Also, if he smiles, should it be with teeth or without?
I know it's a stupid question, but it seems like I'm not even able to answer it myself.
I'll be kinda surprised that a guy whom i see almost everyday starts to smile & talk with me... but i won't get scared.. (unless he's acting creepy all of a sudden & starts being annoying & perhaps asking me personal questions... -____-_
You could start off by approaching her in a friendly manner and saying 'hi' to her. Introduce yourself to her (your name), tell her that you notice her almost everyday .. taking the same buses & metros... then ask what's her name, then shake hands with her and say "nice to meet you". Perhaps from there, you guys would start a convo.. and who knows, you might make a new friend! It's always important that you should act natural (be yourself), be friendly (not creepy or anything). If from the introductions you sense that she's not very fond of you/ not interested/ she's unfriendly.. or anything... then just let it be... i guess? =| I hope this helps! =)
PS: which way to smile? Just smile in a way that you think will make you look your best. Remember.. you should act natural!
ive recently met this girl who interested me. i didnt know she was going out with someone and she flirted with me like crazy. crazy as in ass-grabbing. when i found out that she was going out with someone, it just interested me. so i flirted back and i wanted to see how far she would go. ive realised its that type of girls that should be taught a lesson right? so is it right for me to teach that lesson to her? lol

well... since you now know that she's already in a relationship... I suggest it is best that you stop flirting with her. What if one day her bf comes out of nowhere & caught you guys flirting with each other... and he gets pissed .. and she blames that you are the one flirted with her first? I guess you better avoid her if you don't wanna get into a fist fight or anything.