Salam Brother,
I think the first thing you should do before taken any action, is to pray
Istikhar with faith and ask for guidance, because I think you need to be sure about your fillings and do the right thing in an islamic way.
Mariage is very important in Islam , we should therefore try to choose a good patner, a good mother or father for our children to come inshaAllah.
From what you said about the girl she seems to be a good muslimah,and I encourage you if so to go ahead if your intentions are really islamic and mariage.
You can talk to her in the presence of a muharram,or a third person, let things be clear between you from the beginning.
If you can't talk to her, you can send someone to her, your friend or hers .Someone you thrust.
But then seek for guidance from Allah that is the most important thing, and He will guide you towards the best for you InsahAllah.
May Allah guide us and help all muslims looking for a partner or means to marry.
Amen