Was this situation weird you only think of her as someone you talk to sometimes?

You and another girl pledged the same co-ed fraternity and are also in the same degree program. You have one cl together too. She's really quiet but talks to you sometimes before and after cl and at things for your frat. Sometimes, you give her rides across campus. She only takes them if you offer and a lot of the time she just says no thanks. Today, is your b-day and also Turkey Potluck Day for your frat. She got you a b-day card and a bag of chocolate. She said she got the chocolate b/c you told her you quit soda and replaced it with chocolate (which is what you told her). She said you were a good friend.