Tell to propose one girl without knowing her but ...

Are you asking if you should propose her without knowing her? That's actually a cultural matter. I think that in most western societies it wouldn't be considered as a normal act, although we read from time to time about couples that met through the net and got married after 3 days or so. I'm not an Anthropologist so I can't tell on which cultures it's perceived as normal, especially by the designated bride. 

Anyway, I think that it would be much better for you to make some initial contact with her, she is after all the woman you are going to spend the rest of your life with.  

Your question is not very clear??? It would really help us if U could explain yourself alot clearer....If she is of the same religion and back ground as U then I guess that it is all good??? But if U are talking about someone here in the U.S then I really dont see that as a good idea...Hope this helps..Sorry but thats the best I can do for U with the info U gave us....

You're just saying there's a girl you like, but you never talked her before? Like "love on first sight", you know. The first thing to do is talk. You may be surprised, both in a good, both in a bad way: you want to have pretty and loving fiancee, but you may find you've just fallen in love with a shallow hottie, as appearance could be deceiving, and the way she acts with her friends may not be the way she actually lives and acts everyday.

So, the first thing is talking with her. But you seem a bit shy, and you don't want to seem a sexual predator or something like that.

A good news for you: girls, like boys, actually can be talked too, without feeling a casual chit-chat as sexual harassing. Only, don't push your luck. For the first meeting, try say something very casual. Dont start with "I love you, have a date with me, I'm seeing you everyday from months", she would be truly embarassed. Try simply asking her if she had a nice day and similar stuff, if she seems tired offer yourself to be her listening ear for today, say her you actually go to the place in with you've just met really often, and you're suprised she works/studies/lives in that place too, and she's very fortunate to stay there... then you'll see the arguments of conversation you can hook to will broadens.

You may ask her about her "tiresome" activities, or simply say you're new of the place, and ask her if there's something funny to do. Next time you'll see her, talk her again.

You can't propose to a complete stranger, but you can ask a date to a friend, if you discover she's worth it. If not, simply don't show up again.

you mean to say you actually don't know her?  in what sense?  you don't know her because you don't seem to talk to her most of the time? or you don't know her because you're too shy to talk to her? well, you have to talk to her and become friends first.  try to win her heart by being a friend to her but make sure that you're not hurting anybody before you propose to that girl.  that girl might be waiting for you to propose, better go on with it, or you might loose her.  don't wait for the last minute.  life is so short.

Buy something for  her