Can anyone please give me some advice on this shy girl :/?

Seeing as you're both shy, you should hang out in a group first and slowly you'll get closer. But don't rush it, just let it happen naturally. She's dropping signs that she may be interested in you too, but because she's shy she probably finds it difficult to tell you. When you hang out with a group, she'll start to see what you're like face to face and you guys will become more comfortable around each other. When she stops texting you, maybe she doesn't want to seem like much of a stalker :P It's difficult when you're both shy, but if you really like her and you want to be with her then give it time and things should work out :)