Aww she's cute ^^ Well I can't exactly "teach" you to have her as a gf but I can tell you two things that may help.
1) Be sweet to her,but not overly sweet where it's just creepy but just enough for someone to say aww to.
2) When you two are by yourselves tell her how you feel.Just don't turn it into a novel.
This is my old bf he was really sweet but we had to separate since I had no way to contact him once I moved T-T