What type of girl would you pick?

[I smell bacon]

Girl A: She's cute and you don't know anything else about her besides the fact that she is always flirting with you, and how she seems to be very into social media and physical appearances. You know that this girl is probably the most attractive girl you will ever encounter in your nerd-centered world. Although this girl is a complete mystery, your intuition tells you that she might be very dull and hard to talk to about your career goals (which include obtaining an undergrad, and later on a phd, in physics).

Girl B: She's not very attractive, but she's someone that you have known for a while. She is genuinely hard working, funny, and highly intelligent - but she's weird (in an awesome way). You know that she would be more than just a dull and lifeless girl, she would probably be someone who has similar goals as yourself. However, she is also your research partner and any problems between you and her could result in an a very bad college grade and a loss of research funds (your only method of paying for college and your daily staple of nutritious ramen).

The situation: You see both of these girls everyday in the same college classes. Your partners with girl B, and you begin to notice that she has become very attached to you. However, girl A is always sitting next to or asking you for help during class for some of the most fundamental things. Girl B has also taken notice of this and seems to do everything in her power to keep her away.

What would you do?